W800BT

Of course, the headband is made from high-quality stainless steel. Simply adjust them by straightly bending out these Edifier headphones. 

These headphones are at a low battery level. You should charge them right away.

Please check the following points: 1) Are these headphones' volumes at an appropriate level? 2) Are these headphones correctly connected to your mobile phone?

Please check the following points: 1) Is your mobile in an area with a strong signal? 2) Are these headphones beyond the effective working distance (10m) with your mobile phone? 3) Are there any obstacles between your mobile phone and these headphones?

Please note the battery will be in the SLEEP mode if these headphones haven't been used for a long time. Charge and wait for 30 minutes then the red light will be on again.

Please make sure the paired device supports AVRCP (Audio/Video Remote Control Profile).