Both Earbuds and Charging Case are IPX8 Waterproof Protection IPX8 Waterproof Nano-coating efficiently protects the earbuds and charging case from the damage of the splash by sweat and raindrops. Earbuds and case even can be washed by water and soap. No need to worry when you wear it while running,skiing, etc. (not for swimming) TOZO App  Through the connection with the TOZO app, the headset will be used more effectively and conveniently.TOZO APP offers EQ mode switch, as well as the ability to save customized adjustment about EQ curve settings. It can be used to customize Gesture operations and perform OTA software updates. Ergonomic Design The shape of T10S perfectly fits the curve of inner contour of ear. With round soft silicone eartips, it can offer more wearing stability and comfort when in use. Whether you' re running or jumping, the earbuds will stay in ear securely. One Step Pairing Pick up 2 headsets from the charging case and they will connect each other automatically.