Bluetooth Sports Wireless Headset, Engineerd with multiple rigorous processs, the waterproof level of earplug reaches IPX4, wich effectively prevents the sweat from damaging the headset. For Running, Riding, Climbing & Driving. Specifications: -Wireless version: V4.2 -Transmission Distance: 10M -Frequency -Response: 20-20KHz -Output Sensitivity: 86dB±3dB -Battery Capacity: 65mAh -Rated Power: 3mW -Drive Unit: 10mm -Play Time: ±3.5 Hours -Standby Time: ±6 Hours -Charging Time: ±1 Hour -Net Weight: 20g What's in the box 1 x Wireless Sports Headset