Bluetooth version: V4.1 Effective range: About 10m Bluetooth profile: HFP,HSP,A2DP,AVRCP Frequency response: 20Hz-20KHz Driver unit: 40mm Impedance: 32Ω Sensitivity: 98dB Length (cm): 22,5 Width (cm): 10,5 Height (cm): 26.5 Net Weight (kg): 1.40 Gross Weight (kg): 11.40 Pieces per box: 10