Bone Conduction Headset- Small and covert, more comfortable. is very light, painless wearing in long time use, latest concept ergonomics design fully fit outside the auricle. Speaker Unit Is External- Loudspeaker close to the ear but it is not inside the ear. It will help listens to the surroundings at the same time, let you keep safety for biking, running, driving and more portable for business, work. Ergonomically Designed- Ergonomically designed and lightweight to ensure maximum comfortable wearing experience.. Compatible iOS, Android, WP system, as long as the devices have Bluetooth, it can be used. Bluetooth V5.2+ EDR- EDR Tech enhanced Bluetooth connecting speed and range. Bluetooth distance farther than most of the products in the market Clear Call And High Qulity- Built-in high-performance lithium battery, 8 hours continuous play, 8hours continuous call, 1-2hours fast charge." Description: Bone Conduction Technology: Delivers music through your cheekbones, ensuring ears remain completely open to ambient sounds for maximum situational awareness during long-term wear Bluetooth 5.2 Feature: Continuous connection, non-stuffing, low power consumption, wide compatibility. It can realize fast pairing and stable transmission, and has ultra-low latency Ergonomic design: The ergonomic and lightweight design will make your ears completely comfortable Noise reduction design: It can well solve the environmental noise during the call and provide a better call experienceSpecifications: Bluetooth version: version 5.2+EDR Bluetooth distance: about 10 meters Battery: 150MAH Standbyk time: 140H Charging time: 1.5-2 hours Talking and listening time: about 8 hours Frequency: 20Hz-20KHz Impedance: 32 ohms Sensitivity: 85dB/mW Waterproof rating: IPX 5 Package included: 1 x Earphone 1 x Charging Cable 1 x English and Chinese User Manual