Specification：  

Name: BX240 Bluetooth Sports Headset
Category: In-ear
Type: Mobile phone Bluetooth heavy bass headset
Usage time: talk time about 4 hours, music time about 4 hours, standby time about 160 hours
Charging time: about 1-2 hours
Sensitivity: 118dB
Impedance: 16 Ω
Frequency range: 11Hz-23500Hz