1, headset parameters Bluetooth version: V5.0+EDR Wireless frequency: 2.4GHZ Supporting agreement: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission distance: 10 meters Battery capacity: 50mAh Charging voltage / current: 5V / 1A Play / talk time: about 4 hours Charging time: about 1 hour Standby time: 120 hours Speaker impedance: φ8MM 32Ω Microphone sensitivity: -42Db Working temperature: -10-50 °C 2, charging bin parameters Input voltage / current: 5V / 1A Battery capacity: 1500mAh, 2600mAh