
WOOJER STRAP 4
The room stops mattering.
High-fidelity vibroacoustic wellness you wear. 240 grams, ten hours, wherever the day puts you.
Strap 4 from $169 $143
PORTABLE BY DESIGN
Small enough
for every day.
A compact form that moves from commute to focus to breathwork without taking over the moment.
Made for the in-between
Wellness doesn’t need a room.
Focus. Move. Breathe. Unwind. Strap goes where the rest of your day does.
FIND YOUR SPOT
Your body. Your placement.
Chest. Waist. Cross-body. Along the spine. Move Strap until the sensation feels right for the moment.


Waist

Cross-body

Along the spine
Wear it. Feel it.
This is Strap 4
“Great sound, very comfortable and easy to adjust. Phenomenal listening experience perfect for cleaning, exercising or simply relaxing.”
“It's good for meditating if you like sound bath experience it's Awesome… definitely recommend for people who want something different.”
“I recently received my woojer replacement, I use it for riding on my trainer and missed it for 2 weeks, it helps me dig deep while keeping me focused on my ride…it is an awesome accessory and keeps me riding!.”
“Given as gift for woman with rare condition that left her blind, mostly deaf and unable to feel in her hands. It gives an added element of emersion to her music to give extra sensory feedback since she has difficulty hearing it. Thank you woojer.”
“Thank you so much for making these. My Strap is helping me to experience and enjoy music again after 11 years of being profoundly deaf.”
“Adds new dimension to listening to music! Deep base vibration goes to your body while higher vibrations to ear buds/phones to your ears. Glad I bought this haptic speaker!”
“I recently bought the strap for my son who has visual impairment. With the right films and music the strap really enhances his experience. Great device, well designed and made.”
“Ever wondered what sound feels like in the body?”
“It is fantastic. You will move…to the rhythm.”
“Works well as advertised. Plug in earphones are awesome but not so much for the bluetooth earbuds I have which are better quality. All in all, I'm happy. I'll be using for meditation mostly.”
“I bought this as a gift for my deaf mother in law so she could experience movies and tv shows in a different way and she really enjoys it.”
“The strap is a great item to connect to your phone/portable music player to let you feel the sounds as you exercise.”
“Overall experience has been amazing. Love to listen to all my different genres. Keeps me dancing.”
“I love I walk / take public transportation so it makes jamming out that much better.”
“Im deaf, no words!!!!!! Other level, great job and thanks for create this❤❤❤❤.”
“I bought this as a Christmas gift for a hearing impaired parent! They absolutely loved it and use it for music, movies, etc. You should have seen his eyes light up when he felt the drums, bass, and guitar! Thank you and I will always recommend your product to everyone!.”
“With the Strap, it puts you in a dancing mood on every song.”
“Was a bit skeptical but i must say im actually surprised how enjoyable this product is.”
“Love my WOOJER, helps to pick me up and get me moving, love feeling my music.”
“Amazing experience, I really recommend it.”
“This strap adds a whole new dimension to sound ! I can’t listen to music anymore without it. Very recommended, and this is coming from an acoustics expert / doctoral graduate.”
“I received my Strap at the beginning of December, it's a great product, it's really great, since then I use it every time I go to the weight room I love it.”
“Out of this world! I love the fact that I can now feel the music listened to over my headphones! I also use it at work while coding and it’s just awesome!.”
“I absolutely love my Strap. Highly recommend for anyone who is looking for a more immersive musical experience. Their customer service is also top notch. You don't see that much these days!.”
“Words doesn't do it justice you need to experience it. Feel the sound it will enhance your listening experience to next level. Try it I recommend it.”
“I bought this for my partner as Christmas present and has made it part of her daily ritual when she's listening to her music. She is quite pleased.”
“I am truly impressed with this product. The inventors or owners of this product is a genius!! I love this product. Just gives listening to music and watching movies a whole new meaning. Great job!.”
“I didn't think I would like or find a use for the woojer strap but surprisingly, this product has found a space in my music listening pleasure.”
“I thought I listened to music but the Strap literally makes me feel it creating a whole new way of listening to my music and media that makes me never want to go back before woojer came into my life.”
“Good clean music that I can feel is critical even at low volumes. The Woojer Stap is a part of my personal music equipment. Well done Woojer!.”
“I love music. And that just got better! Immersing myself in my latest playlist after work is a great way to distress. Get lost in the music with this cracking little piece of kit. Comfy and easy to use.”
“Feel the rhythm of the bass with the headphones or earphones. The battery last longer than I thought, portables Subwoofer. Thank you.”
“Works great, it really enhances the experience of my music. Being able to feel the bass while listening to my songs is something that I would have never imagined being able to do. Was definitely worth it for me.”
“ITs a well made Product,my husband Play music and when he listened His first song,the reaction was priceless and hes very happy.”
“No suggestion and no problem to use Strap. This is an amazing product. I like it very much. Thank you for all your assistance.”
“I have literally been sharing my woojer device with multiple people and hands down they are ordering one for themselves and for other friends. It's awesome in every way for people who love listening to music. Thank You.”
“This thing is so nice. I have shown multiple people the product and they are all in agreement. This thing is super sweet!.”
“Yeah this definitely it, it changed the way I listen to music, it took music to a whole new level where you feel it😎.”
“It’s absolutely amazing, total new experience of listening to music, this product brings it up to a new level.”
“I use the Woojer almost everyday since I just love the bass on the device. It also gave me an reason to use my expensive headphone more often, and the best part is that I am able to use my expensive headphone wireless due to bluetooth.”
“Was very impressed. I was sketchy at 1st but im glad I bought it. When went back an got my son one too.”
“I use it to listen to music on my laptop. Now it sound and feels like a concert no matter where I am.”
“I think it's very cool, everyone wanted to know what was I wearing at work and they liked it to.”
“I bought it for my daughter for her birthday she absolutely loves it need to buy one for myself.”
“I love it, it made my headphones even sound way better and the bass that I feel is incredible!.”
“Bought for my partner. He never misses a day without taking it to work with him. He loves it.”
“I bought this for my hubby for Christmas as he loves his music, neither of us had heard of anything like this. He put on one of his favourite songs and almost shed a tear at the experience. Seriously recommend this as the perfect gift for any music lover.”
“Small size, inexpensive but still impressive. Anyone wanting to feel sound can do so.”
“Very good. Did not think this thing had the power but was impressed with the outcome.”
“So happy with this product. I got it for my boyfriend and he absolutely loves it!.”
“I bought the strap for my husband's birthday a couple of days ago. So far, he is very pleased with it. He loves the experience and looks forward to experimenting with some solfeggio tones. I have a feeling it will be a challenge to communicate with him soon!! 😂.”
“Incredible sound experience. Like to wear my Strap during my roller's treks!.”
“I love my Woojer. Thanks for making a great product that is loads of fun!.”
“What a surprise to have another sense to now feel sound as well as hear.”
“It's awesome....I'm getting them for everyone I think would enjoy!.”
“Makes you feel music physically, my best music-lover buy ever !.”
“Bought it as a gift. Recipient loves it and uses it frequently.”
“It was better than I thought it was going to be I'm proud owner.”
“Very easy to setup and use. Greatly enhances movies and music.”
“Great, I'm excited to have a more immersive media experience.”
“I love it! A dream come true! ENHANCES my music experience.”
“It's great. Love how I can feel everything from my music.”
“The person this was bought as a present for loves it.”
“Totally changed the way I listen to music on the go !.”
“I love feeling the bass to all my favorite songs.”
“The joy of sound in a whole new way = woojer.”
“Gift for daughter. She absolutely loves it!.”
“Great product and great experience overall.”
“Works awesome, looks great, fits amazing.”
“This is great I love it love it love it.”
EASY BY DESIGN
Simple to set up.
Place it. Pair it. Play it. Then get on with your day.

Place it
Chest, waist, cross-body or along the spine. Move it until it feels right.

Connect
Bluetooth, USB-C or 3.5 mm. Pair once, then it just finds you.

Play
Choose a Woojer session or your own audio. Set the intensity and go.
the app
Play. Exhale.

Your Woojer comes with dozens of guided programs. Pick a moment, not a setting. Free forever. Deeper if you want it.
Free, forever.
Nothing extra to buy.
Sleep, calm, recovery, body comfort, and dozens of sessions are included with your Woojer. They never expire.
YOUR AUDIO
Use what already works for you.
Spotify, YouTube, Apple Music, and even your own tracks. If it makes sound, it works.
WOOJER DEEP™
More personal. Still simple.
Unlock* full library access, advanced programs, Wooju Intelligence, and seamless wearable integrations. All work together to tailor every session to you.
* Optional subscription
Connected Wellness.
Don't just track. Act.
Your wearable tells you how you're doing. Woojer turns those insights into personalized vibroacoustic experiences that respond to you.
Included with your Woojer Deep™ subscription.
from insight to action.
Your wearable measures. Woojer responds.
Connect compatible wellness data to personalize your experience, while your wearable keeps tracking what happens next³.
*Illustrative data only. Metrics shown are examples and do not represent guaranteed outcomes. Woojer experiences are not intended to diagnose or treat medical conditions.
1,000+ PROFESSIONALS
Made for home.
Trusted by professionals.
From everyday routines to wellness practices around the world, Woojer fits naturally into real life.
Strap 4
One band. Everything in it.
See Strap 4 in action.
This is Strap 4
INSIDE STRAP 4
One compact point
of physical sound.
Osci™ turns low-frequency audio into precise physical sensation inside a wearable form.
WOOJER STRAP 4
Take the feeling with you.
Everything you need to start, with no required subscription.
- Osci™ TRX2 high-fidelity haptics
- Multiple wearing positions
- Bluetooth, USB-C and analog audio
- Soft carrying pouch included
- 30-day money-back guarantee · 12-month warranty


What’s Included
Woojer Strap 4
Carrying pouch
USB-C cable
3.5 mm audio cable
Haptic Engine
One powerful, patented Osci™ TRX2 transducer
1-250Hz frequency range
Audio
Wired headphone amplifier
Supports Bluetooth headphones
Advanced DSP control
Connectivity
Bluetooth 5.0 audio
3.5 mm TRRS in/out
USB-C stereo audio input
Battery
Up to 10 hours on a single charge
USB-C charging, about 3 hours
Fit
Adjustable strap, one size
Chest, waist, cross-body or spine
Style
Interchangeable covers
Make it yours
TRY IT AT HOME
30-day money-back guarantee.
Use Strap 4 for 30 days. Not for you? Send it back for a refund.
12-month warranty · Free US, Canada & EU shipping.
GOOD QUESTIONS
Everything you want to know.
What does the Woojer Strap 4 do?
The Strap 4 is the smallest way to feel sound instead of only hearing it. One patented Osci™ transducer, worn on the hips, chest or cross-body, reproduces the low frequencies in any audio as physical sensation, in silence, anywhere.
A breathing session at a desk, a soundscape on a train, music, films and sessions: vibroacoustic technology in a 240 g band.
What does the Woojer Strap 4 connect to?
Anything that plays audio. The free Woojer Wellness app, Spotify, Apple Music, YouTube, a meditation app or a frequency generator on your phone, tablet or computer.
It also connects to a TV or a computer, for music, films and sessions. Nothing ties it to a platform.
What is the difference between the Strap 4 and the Vest 4?
The Strap has one Osci™ TRX2 transducer in a light band you position where you want it. The Vest has six across the torso in stereo. Both cover 1 to 250 Hz, both run up to ten hours, both connect the same way and both take your headphones. The Strap is the portable way in; the Vest is full-body immersion. Many owners run both.
Why does the Woojer Strap 4 cost what it does?
Because the technology inside it is the same technology inside the Vest and the MAT.
One patented Osci™ transducer reproducing 1 to 250 Hz with the dynamics of the source intact, in a band that weighs less than a phone. Not a motor, not a buzzer: the physical structure of the sound, wherever you are.
Shrinking that engine is the whole achievement. It is what puts real vibroacoustic technology on your hips, in a pocket, on a train, and within reach of far more people than a room ever could.
Is the Strap 4 real haptics or just a buzzer?
Osci™ is a patented oscillating-frame actuator. Not a phone-style buzzer, not a motor.
It reproduces low frequencies accurately and polyphonically, so a long breath, a kick drum and an engine each feel entirely different, and it follows the source instead of pulsing at one level. It is the same technology family that carries the MAT and the Vest, engineered down to 240 g.
Is the Woojer Strap 4 safe to wear over my heart?
The Strap delivers low-frequency sound sensation, the same frequencies you feel standing near a stage, and is designed to meet UL, CE and FCC standards with a magnetic field around five percent of the ICNIRP guideline. It contains powerful magnets, so do not use it if you have a pacemaker or any other electronic or mechanical device implanted or attached to support your body, or if you use a defibrillator. Consult your physician before using it if you have chest pain or pain in your neck or arm, shortness of breath or a heart condition, if you are pregnant, if you take medication (especially for your heart or blood pressure), or if you have any other health concern, such as back pain. If you feel pain, dizziness or anything unusual, stop and ask your doctor.
Can I try the Woojer Strap 4 before I buy it?
Yes, at home. Every order carries a 30-day money-back guarantee: use it in your own setup and return it within 30 days if it is not for you.
What do people use the Strap 4 for?
Sessions and music are where it lives: a wind-down at a desk, breathwork on a train, an album in bed, without a speaker in the room.
Films land the same way.
Will the Woojer Strap 4 fit me?
One size, adjustable from 15 to 65 inches (40 to 165 cm). It fits every body and every position: hips, chest or cross-body.
Does the Strap 4 hurt?
No. Intensity is fully adjustable from a gentle presence to a serious kick, and the sensations are low frequencies, not impacts.
What transducer is inside the Strap 4?
One patented Osci™ TRX2 transducer with a 1 to 250 Hz frequency range and advanced DSP control, the same technology family as the Vest 4 and the MAT.
That lineage is the point. Low-frequency hardware is normally large and heavy, so the products around it are large and heavy too. Woojer re-engineered the actuator into a frictionless oscillating frame, which is how instrument-grade low frequencies end up in a band you can wear on a train.
How do I connect the Strap 4?
Bluetooth 5.0 with dual transmit and receive, a 3.5 mm stereo line-in that supports headsets with a mic (TRRS), and USB-C stereo audio input.
Is there latency over Bluetooth?
Bluetooth uses the standard A2DP codec, the same small delay as any Bluetooth headset. For the tightest sync with video, use the included 3.5 mm cable and the delay is gone.
Does the Strap 4 work with my iPhone and AirPods?
Yes. The Strap receives audio from your iPhone, Android phone or PC and passes it on to your AirPods or other Bluetooth headphones at the same time. Wired headphones plug into its built-in headphone amplifier.
How long does the Strap 4 battery last?
Up to ten hours per charge from its rechargeable lithium-ion battery, and about three hours to charge from empty over USB-C.
How much does the Strap 4 weigh?
240 g, about half a pound. Light enough to forget until the drop.
What are the three modes on the Strap 4?
Broad, Focus and a punchier third mode, each tuned for a different kind of sound. Haptic intensity is adjusted separately from volume, on the Strap or in the Woojer Device Manager app.
Does the Strap 4 work with a TV?
Yes, with any TV or streaming device that has Bluetooth or an analogue output.
Is the Strap 4 silent to other people?
Virtually. The sensation travels through you, not the room, so you can use it at any level for hours without disturbing anyone.
Can I change the look of the Strap 4?
Yes. The Strap 4 takes interchangeable covers, so you make it yours.
Where do I wear the Strap 4?
Around the hips for sessions and music, across the chest for breathwork and films, or cross-body on the move. Wherever it sits, the low frequencies travel through the body.
Do I need an app or a subscription to use the Strap 4?
No subscription, ever. The free Woojer Wellness app gives you sessions composed for the body, and beyond it the Strap behaves like any audio device, with every track, podcast and film you already own.
The free Woojer Device Manager app handles pairing, modes and firmware updates. Keep the Strap on the latest firmware and it always performs at its best.
Can I use my headset mic with the Strap 4?
Yes. The Strap's 3.5 mm input supports TRRS, so a headset with an inline mic passes straight through.
Does it work with my TV, phone and other devices?
Yes. Pair over Bluetooth, or run the included 3.5 mm cable from the device's headphone output into the Strap, then plug your headset into the Strap. Set the source volume high and shape the level on the Strap.
How do I use the Strap 4 with my phone?
Pair it over Bluetooth or plug in the 3.5 mm cable. Your headphones then pair to the Strap, wired or Bluetooth, and your music arrives in your body as well as your ears.
How do I get the sharpest feel from the Strap 4?
Go wired, set the source volume to maximum, choose Focus for sessions and music, or Broad for film, and set the intensity so the peaks do the work.
Can I use the Strap 4 for movies?
Yes. Connect to your TV or streaming device and the film's low end arrives in your body instead of the room, at any hour.
How do I clean the Strap 4?
Wipe it with a moist cloth. It is not washable and not water resistant.
Can I use the Strap 4 if I am hard of hearing or deaf?
Yes, and you will be amazed. The session, the music and the film all arrive through the body, with or without the audio.
Can I wear the Strap 4 and the Vest 4 together?
Yes. Many owners run both, the Vest across the torso and the Strap on the hips, for the most complete experience Woojer makes.
How long does Woojer Strap 4 delivery take?
Orders ship within two business days and typically arrive three to five business days later. Your exact estimate is shown at checkout, with a tracking link the moment it leaves the warehouse.
Where does Woojer ship from?
From the warehouse closest to you: United States, United Kingdom (London), European Union (Netherlands) or Hong Kong.
Will I pay customs or import fees on a Strap 4?
In the UK and EU, no: VAT is included in the price you see. In the US, state sales tax is added at checkout. Orders to Canada, Norway, Hong Kong, Taiwan and other regions outside the US and EU may be charged local import taxes on delivery; checkout tells you before you pay.
Which countries does Woojer ship to?
More than fifty countries, in local currency. Enter your address at checkout and every available destination is listed.
What is the return policy on the Strap 4?
You have 30 days from delivery. Request a return authorization through support and send it back in its original box with all accessories for a refund.
Who pays for return shipping?
It depends on where you live. In the US, we send you a prepaid return label through Happy Returns, and a flat return fee comes off your refund: $15 for the Strap and for each accessory. In the EU, you book and pay the return shipping in our Returnless portal. In the UK and everywhere else, you send it back yourself with a tracked service. Request your return authorization first and send everything back in its original box, and nothing else is deducted. A 15% restocking fee applies only to a return sent without an authorization or with parts missing.
What warranty comes with the Strap 4?
A 12-month limited warranty against defects in materials and workmanship from delivery. Your Woojer order number is your proof of purchase.
My Strap 4 will not turn on after a long time unused. Is it broken?
Almost never. Leave it on the charger untouched for a few hours; a deeply drained battery needs a longer wake-up. If it still will not power on, update the firmware in the Woojer Device Manager app and, if needed, open a ticket with your order number.
Can I change my address or cancel after ordering?
Yes, as long as the order has not shipped. Open a ticket with your order number as soon as possible and choose the cancel or address-change option.
What comes in the box with the Strap 4?
The Strap 4, a carrying pouch, a USB-C charging cable and a 3.5 mm audio cable.
ONE PLATFORM. THREE FORMS.
Want more coverage?
Vest wraps the torso. MAT turns the ritual full-body.

