Bluetooth specifications: Bluetooth V5.4 Jerry AC7003. Support protocol: Headset Hands-free A2DP Avrcp. Transmission range: 10 meters. Transmission frequency: 2.4GHz. Maximum RF output power (EDR): 4DB Modulation type (EDR): GFSK, π/4-DQPSK. Speaker: 13MM; Impedance: 32Ω±15%. Frequency response: 20~20000Hz. Sensitivity: 98db±3db. Charging voltage: DC5V. Charging time: about 1 hour. Charging box battery capacity: 360mah. Left and right ear battery capacity 30mAh each. Talk time: about 4 hours. Music time: about 4 hours. Net weight: 57.6g (including charging compartment). Bare device weight: 3.7g (single ear). Size: 60.6*45.2*23mm. Color: White
