Device Specifications:<br> Devices Bluetooth version: V5.2<br> Wireless operation Range: 45-65 feet<br> Rechargeable Lithium Battery: 250mAH<br> Micro USB Charge: 5V/0.5A<br> Charge Time: 2-2.5 Hours<br> Music Playing time: Up to 10 hours<br><br> Why Choose Voerou Wireless Sleep Headphones?<br> 1.Bluetooth Sports Headband and Wireless Sleep Headphones 2 in 1<br> 2.Upgrade Bluetooth V5.2 Great Sound Quality<br> 3.The Control Module is in the Middle, which is best for side sleeper<br> 4.Playing Time last more than 9 hours with upgrade Rechargeable battery<br><br> Bluetooth Music Play Instruction:<br> 1. Press once PLAY/STOP button start playing, press once again to stop playing<br> 2. Press Vol- for previous song /Press Vol+ for next song<br> 3.Long press Vol- will constant reduce volume to minimum, a 'di di di 'sound will be heard when reaches minimum level<br> 4.Long press Vol+will constant increase Volume to max, a 'di di di' sound will be heard when reaches max level<br><br> Wireless Handfree:<br> 1. Incoming call, press once PLAY/STOP Button for auto receives call.<br> 2. Incoming call, press and hold PLAY/STOP Button for 3 sec to reject call.<br> 3. During call, long press PLAY/STOP Button for 3 sec to switch to mobile device;<br> press. PLAY /STOP Button again for 3 sec will switch back to earphone.<br><br> Notes:<br> 1.Open the bluetooth in your phone and match with bluetooth named "BT-FAAH"<br> 2.Can be washable when take out the control module.<br> 3.Both speakers are not fixed, can adjust placement accordingly based on your size<br> 4.Please adjust the volume from your mobile or Long press Vol+ from bluetooth if you can't hear any music.<br> 5.The sound may have a bit noise if there's environmental interference <br> 6.If you have any problem with using our product, please contact us directly via order id. We promise to solve the problem for you 100%.<br>