f9 wireless earphone bluetooth headset tws in-ear motion stereo 5.1 battery capacity 2000mah fingerprint led display mode touch

up and down song switching, volume adjustment,play/pause, call rejection, one-click etc.please contact us if you have any questions. 1. we do not accept any refund without no reason. 2. we don't refund full if the partial items is damaged in delivery due to some objective matter. but we can accept a partial refund for compensating the damaged part. 3. if the product has quality problems, you can take pictures and vedio to us. when we confirm it , we will give you a satisfactory solution and refund you the damaged part