True Bone Conduction: 360 ° no hole design, it is safer and healthier to make ear bones sound pleasant through high frequency and low density vibration, while avoid the embarrassment of sound leakage Open Ear Design: The open design allows you to clearly perceive the ambient sound while enjoying your music, detecting potential dangers during riding or sports in time, and providing more peace of mind during outdoor activities Enhanced Surround Sound: Bone conduction headphones with high-frequency oscillator enhancement technology that enhances bass detail for rich musical performances and optimizes stereo surround sound for sports, allowing you to enjoy an immersive listening experience Bluetooth 5.4: Upgraded Bluetooth 5.4 chip brings more stable wireless connection, wider signal coverage and lower power consumption. Easy pairing, clear and smooth calls, lossless and efficient music transmission, goodbye to disconnection 10H Long Battery Life: This open-ear bluetooth sports headphone can enjoy 10H of music with 1.2H charge and super standby 168H. Ensure that you don't need to charge frequently during use, no battery anxiety, enjoy uninterrupted audio experience IPX5 Waterproof: Fearless of sweat and rain! IPX5 rated waterproof design effectively protects against sports sweat, daily splashes and light rain, allowing you to run, ride and work out to your heart's content, and the headphones are long-lasting and durable Lightweight, Comfortable & Stable: These waterproof bone conduction headphones are made of titanium alloy memory back hangers, triangular earwing wrap-around design, which is in line with human ear ergonomics, suitable for different head shapes, fit tightly and comfortably, and can't be shaken off wildly even if you're a sports fanatic Color Black Impedance 8 Ohms Brand Name Sanag Model Name sanag B21S Unit Count 1.0 Count Item Weight 22 Grams Control Type Button Control Manufacturer Sanag Model Number sanag B21S BuiltIn Media Type-C Cable, User Manual Noise Control None Control Method Push Button Earpiece Shape Circle Headphone Jack No Jack Bluetooth Range 10 Meters Controller Type Button Frequency Range 20 Hz - 20,000 Hz Number of Items 1 Antenna Location Calling, Cycling, Exercising, Running Audio Driver Size 13 Millimeters Audio Driver Type Bone Conduction Driver Bluetooth Version 5.4 Compatible Devices Cellphones, Desktops, Tablets, Telephones, iPad Enclosure Material Acrylonitrile Butadiene Styrene (ABS), Polycarbonate (PC) Frequency Response 20 Hz Additional Features Bone Conduction, Open Ear Design, Enhanced Surround Sound Battery Charge Time 1.2 Hours Wireless Technology Bluetooth Battery Average Life 10 Hours Warranty Description 1-year warranty Water Resistance Level Waterproof Connectivity Technology Wireless Headphones Ear Placement On Ear Headphone Folding Features On Ear