● Speaker Unit: Φ40mm

● Magnet: Neodymium

● Sensitivity: 110+/-3dB

● Impedance: 32 ohms+/-10%

● Frequency range: 20~20KHz

● Active cancellation: 20~25dB 

● Power: 3.7V  360mah

● Blue-tooth version: ACT3009   V5.0

● operation distance: 10m

● Continuous working time: 12 hours