This Bone Conduction Wireless Bluetooth Headset has an U composite ergonomic design ， even long-wearing， still comfortable. Exquisite piano paint technology， with the smooth matte feel inside， textured form unforgettable experience， make the unforgettable feeling experience. Show you the real world， restore the sound perfectly for calling， listening music， play games. <br> <br> <strong>Features:</strong> <br> Open the ear， away from danger. <br> Calling while driving， safety. <br> Clean， keep your ears away from the bacterium. <br> The U-Shaped design， comfortable to wear. <br> Bluetooth stereo. <br> Wireless Freedom. <br> Clear Calling. <br> A wonderful solution for vision-impaired individuals. <br> <br> <strong>Specifications:</strong> <br> Speaker Type: Bone Conduction Wireless Bluetooth Headset <br> Model: YKL-7OI <br> Material: Plastic <br> Color: Black <br> Bluetooth version: V4.0 <br> Li-battery: 3.7V / 200mAh <br> Frequency rang: 100Hz~18KHz <br> Playback time: Up to 6 hours (depending on volume etc) <br> Standby time: Up to 30 days <br> Charging time: About 3 hours <br> Wireless range: 10 meters <br> Product size: Approx. 14.5 * 14.5cm / 5.7 * 5.7in (L * W) <br> Product weight: Approx. 49g / 1.7oz <br> Package size: Approx. 17.5 * 17.5 * 6.5cm / 6.9 * 6.9 * 2.6in <br> Package weight: Approx. 291g / 10.3oz <br> <br> <strong>Package including: </strong> <br> 1 * Bone Conduction Bluetooth Headset <br> 1 * USB Cable