2. Ergonomic structure for long time wearing comfort.<br /> 3. Outstanding wideband sound with high performance <br /> 4. Neodymium drivers<br /> </p> <p>1.Bluetooth version:V5.0<br /> 2.Rechargeable battery: Lithium battery 180 mAh<br /> 3.Bluetooth profiles: HSP, HFP, A2DP and AVRCP<br /> 4.Bluetooth function range :10m<br /> 5.Playtime music: 18 h (mid volume)<br /> 6.Standby time: 200 hours<br /> 7.Driver unit: 40mm neodymuium<br /> 8.Sensitivity: 98dB±3dB <br /> 9. Impedance: 32Ω<br /> 10.Microphone Sensitivity: -42dB<br /> 11. Support hands-free conversation</p> ">