Long Runtime & USB Type-C Rechargable Battery - Our battery of bike headlight as same as the battery of bike taillight, which all equipped with a 500mAh rechargable battery. Run time last for 3-15 hours(The Front) and 5-42h. In "Slow Flash" mode, the headlights can last up to 15 hours and the taillight lasts 42 hours. Memory Mode & 180 Degree Radiation Surface - When you turn it on again, the memory mode can keep the previous lighting mode, reducing the trouble of setting it again. At the same time, the illumination surface of the rear light can reach 180 degrees, and there are 4 red warning lights on the left and right sides, so that the light source is emitted from both sides of the casing to realize a 180-degree wide-range warning. IPX6 Waterproof - They can reach IPX6 waterproof level, this bick light set works well on rainy or foggy days, allowing you to enjoy your ride. The USB port comes with a waterproof silicone cover that effectively blocks water and extends its life. Double Barrel Lamp & 6 Light Modes - The front light consists of 2 XPG2 lamp, which has 5 modes, and the rear designed with 6 modes which equipped 16 SMD red LED light, irradiation distance can reach 328-656 ft, 300 lumens front, 50 lumens rear at max power, making it a good option for urban riding. Easy to Install - The bike light can be installed with your bare hands without the aid of other tools, even for the children. 4 easy steps - Take out the silica glue strap, pass through the mounting holes behind, and fix the appropriate position on the bicycle car, buckle the strap.