Bluedio Turbine Hurricane H Bluetooth 4.1 Wireless Stereo Headphones HeadsetFeature: 100% brand new and high quality. Drivers: 57mm speaker X 2 Transducer type: dynamic Bluetooth version: V4.1 Frequency range: 2.4GHz-2.48GHz Operating distance: up to 10m (free space) Bluetooth profiles: A2DPAVRCPHSPHFP Impedance: 16 Frequency response: 20Hz-20kHz Sensitivity: 110dB Distortion:<0.1%(THD) Music playtime: up to 40 hours Talk time: up to 45 hours Standby time: up to 1625 hours Charging time: about 2 hours Operational temperature: -10 to 50C Color:BlackPackage Included:(With Retail Package) 1 * Headset