Strap 4 User Manual

YOUR WOOJER STRAP
1. Power/Bluetooth button
2. Analog audio-in port
3. Digital USB-C input Port/charging port
4. Wired headphone jack
5. Swappable ring
6. Volume Up button
7. Volume Down button
8. Sensation Up button
9. Sensation Down button
10. Belt socket

CHARGE YOUR STRAP

UPDATE THE FIRMWARE
To get the most out of your Strap, make sure you're using the latest available firmware.
Launch Woojer app to update the firmware.


CONNECT YOUR STRAP

Launch
Woojer APP

POWER ON/OFF

3 seconds long-press on the power button - Strap is on
3 seconds long-press on the power button - Strap is off
WEAR YOUR STRAP
1. Put on
2. Buckle up
3. Tighten the belt

Diagonally across the chest
On your waist
Around the chest
On your spine
PLAY YOUR MUSIC!
FINE TUNE YOUR EXPERIENCE
1 Volume up button
2 Volume down button
3 Sensation up button
4 Sensation down button
AUDIO-HAPTIC SYNC
To adjust audio-haptic sync:
launch the Woojer app
WIRED HEADPHONES
If you’re using wired headphones, connect them to the headphone jack
MANUAL BLUETOOTH PAIRING
CONNECT TO A BLUETOOTH AUDIO SOURCE
With the Strap powered off, press and hold the power button for 5 seconds
The left half-ring will blink in alternating Red/Blue
On your mobile, locate and pair with "Woojer Strap 4"
CONNECT TO BLUETOOTH HEADPHONES
With the Strap powered on, press and hold the power button and the volume up button together for 5 seconds
The right half-ring will blink in alternating Red/Blue
CONNECT YOUR GEAR

MIX & MATCH
Unscrew the ring and replace with a new one.
Slide out and replace the elastic band.
Discover more add-ons for your strap at www.woojer.com/accessories
LED BEHAVIORS

Bluetooth audio source pairing mode →Left half of the circle blinking red-blue

Bluetooth headphones pairing mode →Right half of the circle blinking red-blue

Searching for audio source → a running blue light on the left half of the circle

Searching for Bluetooth headphones → a running blue light on the right half of the circle

Audio source connected → solid blue light on left half (or user-defined pattern)

Headphones connected → solid blue light on right half (or user-defined pattern)

Low battery → circle blinking red

Charging → gradual filling, color changing from red, through orange to green

Charging complete → full green

GET SUPPORT
Need help? Get more information at
www.woojer.com/support
TECHNICAL SPECS
BATTERY: Battery 3.6V 3500mAh
CHARGING PORT: Standard USB-C
CHARGING VOLTAGE: 5V
CHARGING TIME: 3h
HAPTIC FREQ RESPONSE: 1-250Hz
AUDIO FREQ RESPONSE: 20-20KHz
TRANSDUCER: 1x Osci V2 TRX
AUDIO OUTPUT: Aux 3.5mm TRRS, BT Audio A2DP
AUDIO INPUT: Aux 3.5mm TRRS, USB-Stereo Audio, BT Audio A2DP
BLUETOOTH: Bluetooth 5.0 Audio, BLE App Control and Update
HEADPHONES AMP THD: 1%, f = 1 KHz
HEADPHONES OUT S/N RATIO: 98 dB
HEADPHONES AMPLIFIER OUTPUT: 138mW

WARRANTY
12 months from purchase.
You can learn more about the warranty through this QR code.
www.woojer.com/warranty
CARE AND MAINTENANCE
•Keep the Woojer Strap Series 4 and accessories device dry. Precipitation, humidity, and all types of liquids or moisture can contain minerals that will corrode electronic circuits.
•Do not store the device in hot areas. High temperatures can shorten the life of electronic devices, damage batteries, and warp or melt certain plastics.
•Do not store the device in cold areas. When the device returns to its normal temperature, moisture can form inside the device and damage electronic circuit boards.
•Do not attempt to open the device.
•Do not drop. Rough handling can break internal circuit boards and fine mechanics.
•Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the device.
•If the device doesn’t work properly, please contact our technical support team through our website, at www.woojer.com/support
SAFETY AND WARNINGS (READ CAREFULLY BEFORE USE)
•This product contains a rechargeable lithium-ion battery and should not be disposed together with household waste. This product must be discarded in accordance with your local legal requirements.
•As with other devices with permanent magnets, Woojer Strap Series 4 is not suitable for use by persons with pacemakers.
•Do not use Woojer products during pregnancy without approval from your physician.
•Do not use Woojer Strap Series 4 with headphones/earphones while driving, cycling, or operating any motorized vehicle. This may create a traffic hazard and may be illegal.
•It can be dangerous to play your music with headphones/earphones at high volume while walking or engaged in other activities. Exercise extreme caution and discontinue use in potentially hazardous situations.
•Avoid using headphones/earphones at high volume. Hearing experts advise against continuous loud and extended music play. Keep the volume at a moderate level, so that you are better able to hear outside sound.
•If Woojer Strap Series 4 overheats excessively during use, do not use it and contact our technical support team through www.woojer.com/support
•Avoid charging your Woojer Strap Series 4 at extremely high or low temperatures.
•Liquids might short-circuit the battery and cause a significant risk of fire, other bodily injury, and physical damage.
DECLARATION OF CONFORMITY, CERTIFICATES,AND SAFETY PROTOCOLS
Federal communications commission notice this device complies with part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and(2) this device must accept any interference received, including interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
NOTE:
This equipment has been tested and found to comply with the limits for a class b digital device, pursuant to part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation if this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.The device has been evaluated to meet the general RF exposure requirement. The device can be used in portable exposure conditions without restriction.
CANADA-INDUSTRY CANADA (IC)
This radio transmitter has been approved by industry Canada.
This class B digital apparatus complies with Canadian standard ICES-003 this device complies with industry Canada license exempt RSS Standard(s).
Operation is subject to the following two conditions.
(1) this device may not cause interference and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
The device has been evaluated to meet the general RF exposure requirement.
The device can be used in portable exposure conditions without restriction.
Bluetooth:
The Woojer Strap Series 4 qualified design listing was achieved in accordance with the Bluetooth qualification process as specified within the Bluetooth specifications.
CE declaration of conformity:
We, Woojer LTD., Declare under our sole responsibility, that this Woojer Vest Series 3 product is in conformity with the standards and other normative documents.
©2025 – Woojer Ltd. All rights reserved.The Woojer Strap 4 packaging, logos, icons, “Ready. Play. Feel.”, “Born to Feel”, and “Haptifeels” are trademarks of Woojer Ltd., Woojer USA Inc. and their subsidiaries in the United States and other countries.