Ture wireless bluetooth earbuds (TWS)
Speaker Unit: Φ40mm
Magnet: Neodymium
Sensitivity: 110+/-3dB
Impedance:32 ohms+/-10%
Frequency range:20~20KHz
Active cancellation: -23dB 
Power box: 3.7V  420mah
earbud: 3.7V  43mah
Blue-tooth version:CSR  5.0
operation distance:10m
Continuous working time:12 hours
Wireless Charger