Certification CE FCC ROHS Tiny earbuds convenient to use Touch control double keys operation 6mm composite membrane driver element Supoort HIFI sound quality CVC penetrating calling Comfort design for ergonmics Materials have ABS and PC Wireless solution is Jerry AC6976D Wireless version is BT 5.1 Wireless support agreement AVRCP HSP HFP A2DP Transmission distance is 10m-15m Frequency Response 2.402GHz-2.480GHz Battery capacity 30mAh 300mAh The case of charging times for earbuds 3-4 times Driver Element Composite membrane speaker 6mm Frequency Response 20Hz-20kHz Playing time is 3-4h Standby time is 120h Charging time is 1h Color Black pink white