Patented osci haptic technology: Reproduces low-frequency audio as detailed physical sensations for a more immersive experience
Bluetooth 5.0 connectivity: Enables wireless audio streaming and haptic control for seamless integration with devices
USB-C and 3.5 mm audio inputs: Offers versatile compatibility with a wide range of audio sources
Adjustable wearable fit: Can be worn around the waist, across the chest, or crossbody for personalized comfort
Up to 10 hours battery life: Ensures long-lasting use for extended listening sessions
Summarized by Shop
FEEL IT. ANYWHERE. Woojer's most compact vibroacoustic wearable.
Strap 4 transforms audio into precise physical sensation in a remarkably small, wearable form.
Music. Gaming. Movies. Workouts. Meditation. Relaxation. Whatever you play, Strap 4 brings the physical dimension of sound with you. Small form. Serious feeling.
At the heart of St
Haptic Frequency Range
1–250 Hz
Connectivity
Bluetooth 5.0, USB-C, 3.5 mm audio
Weight
Approximately 240 g
Battery Life
Up to 10 hours
Material
Fabric, Plastic
Compatible Devices
Smartphone, Tablet
Summarized by Shop
4.6
35 ratings
5
4
3
2
1
It is fantastic. You will move…to the rhythm.
Wish the battery lasts more than a day.
Saving up for the vest4.
J
Jonathan · June 20, 2026
The website overhypes this product to an insane degree. I got this hoping it would be simple to use and fun. When I opened the package. I charged the device and set it up. Nothing you wouldn't expect, however, when I started using the device it maxed out my volume on my phone. And nearly blew out my eardrums when I tried turning it off. For whatever reason, the app seems to max out your volume every single time you turn it on. Making you manually turn down the volume to a reasonable degree. When I used this device on a higher setting. Also known as sensitivity. It began making a strange metallic rattling and clanking sound. Almost as if it was going to rip itself apart. Another huge problem with this product, is the Bluetooth sync. If you try to disconnect it and connect it to another device. It will fight you the entire time and essentially will not work at all. The app doesn't make this any easier, it is nearly impossible to get it to unsync from one thing and sync to another.