Description: 1.Bone Conduction Technology - bone conduction headphones is open ear design, you needn't to put the headphones into your ears, protects your hearing and you can hear sounds around you when you are listening to music or on the phone 2 for Long-term Wear - Built-in 120mAh lithium battery 3.Fast and Stable Connection - Advanced 5.1 headphone is more fast and stable than 5.0 to connect you phone or other device. 4.With LED Indicator 5.With Volume Control Button, Answer/Pause/Play Button 6.Memory titanium alloy rear hanging design Support 360 degree bending Not easy to damage Not deformed 7.Large Bass Diaphragm, 3D , Shock Bass, Pure Voice 8.Lightweight, Zero Burden, Unrestrained 9.CVC Professional Noise Reduction 10.TPE Material, Skin-friendly, Non-irritating 11. Waterproof and sweat proof, Not afraid of sports, sweating; Fully enelosed voice cavity to prevent the infiltration of daily rain and sweat, Just wipe the tube and it will look new. Specification: specification:5.1 Weight: 20g BT distance: 10-15M Speaker Type: Bone Conduction Technology Speaker Frequency: 20Hz-20kHz Microphone Sensitivity:-42db BT Version: V5.1 Battery: 120mAh Lithium Polymer Battery Play time: 4-5 hours Talk time: 5-6 hours Headphone charging time: 1.5 hour Standby Time: 5 days Package Includes: 1x Bone Conduction Headphone 1 X Charging Cable 1X User Manual