Open-Ear Wireless Bone Conduction HeadphonesBone conduction technology allows hearing the world around you with nothing in your ears.Universally compatible with most Bluetooth enabled devices, including cellphones, tablets, computers, TV.There is no discomfort caused by the bone conduction headphones vibrating at the ear. Does not make you feel any urgency, can be worn for a long time.If you are an athlete, this Bone Conduction Wireless Headphones is best for you.Suitable for running, cycling, fitness, hiking, rock climbing, and drivingSpecifications:Type: Bone Conduction HeadphonesBT Version: V5.0Color: Black, GreyTransmission distance: within about 10m(33feets)Microphone Sensitivity: -42 3dbFrequency response range: 20Hz ~ 20KHzPlay time: about 6 hoursBattery capacity: 200mAhStandby time: 10 daysProduct weight: about 36gPackage content:1 x Bone Conduction Headphones1 x USB Data line1 x User GuideThank you very much for your trust and support, and I wish you a happy life.