Model: V11Specifications: V11 English version of the digital display touch 5.0 black English version 4000mahBluetooth version: 5.0 Support Protocol: Support HFP 1.7, HSP 1.2, A2DP 1, AVRCP1.6, SPP 1.2 and PBAP 1.0Talk time: about 3-4H (full power single use)Listening to the song time: about 3-4H (full power single use)Battery type: 3.7V, 50mAHInput current: 5V 1000mAInput headphone current: 5V 100mAMobile power output current: 5V 1000mACharging battery capacity: 4000mAh/2400mAhPacking list: Bluetooth headset 2pcs charging storage box 1pcs manual 1 certificate 1 pcs ear cap 3 sets (large, medium and small) charging line 1