TWS bluetooth headphone

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BT version: 5.0+EDR support Profile:HSP/HFP/A2DP/AVRCP size:23.5*20*22mm talking time :4hrs play time :4hrs NW.:4.5*2g charge box:68*68*30mm charge weight:35g battery:headphone 40mah ,charge box 500mah Function:answer/reject call,play/pause music ,freehands,bluetooth,voice prompt,call id, volume adjustment,up and down