XLITE100- ETA100 IPX-6 Detachable USB Rechargeable Intelligent Sensor Brake Taillight Features: 1. High quality of materials, Easily install on anywhere of your bicycle with an adjustable strap. 2. This kind of light is sensitive when you are braking,and it will automatically switch to braking light to warn rear cars. 3. It can be charged by USB and rechargeable. 4. Wide-angle reflection,waterproof,high brightness with COB LED. 5. Intelligent light: Automatic turn down the light when in daytime,while turn up in night cycling. When the light is turned on in two modes, there are three modes of brightness: constant, flashing and breathing. If you want to switch, just press the black dot in the middle and it is a different mode, all on your own. Specification: Material: Aluminum Alloy Type: COB LED Light Color: Red Power Supply: Built-in Battery(Charging by USB) Lighting Time: 20h Waterproof Level: IPX-6 Size: One Size 45x34mm(1.77x1.34in) Quantity: 1 Pc