BRAND : MOXOM MODEL : MX-TW54 Music time. 5h Standby duration 55h Hom impedance : 32 Ohm Standard Input voltage DC : 4.8-6V Frequency response range: 30-15KHz Charge port : Type-C Supported protocols: HSP HFP A2DP AVRCP Battery capacity of earbuds : 30mAh x 2 velth protection board Battery capacity of charging case:300mAh Charging time. 1.5 Talk time: 3.5h Operation range ± 10 Meter