Datasheet

Troubleshooting
If you cannot connect the headphones to your Bluetooth audio
device or mobile phone, do as follows:
Ensure that the headphones are charged, switched on, paired
with, and connected to your Bluetooth device.
Ensure that the Bluetooth feature is activated on your device.
Check that the headphones are within 10 meters / 33 feet of
your device and that there are no obstructions between the
headphones and the device, such as walls or other electronic
devices.
To reset the headphones if it stops functioning (although it is
charged), supply the headphones with USB power, then
simultaneously press and hold both the Volume Up “+” and
Multifunction buttons for more than 6 seconds (Note
however, this reset does not clear your paired device
settings).