handsfree Stereo Bluetooth headphone A2 >stand - alone, >shaft type USB/specification, charger, >charging straight gift box handsfree Stereo Bluetooth headphone A2 technical standard:Bluetooth version V2 ... set:200gholding time:3hoursStandby time:160hoursConfiguration: stand - alone, shaft type USB/specification, charger, charging straight gift box.Cixin for best-selling ...