Most powerful model in the Seemee bike tail light series, the Seemee 200 has a 200 lumen main light and a secondary tracing light, providing optimal visibility for urban and road cyclists. 200 lumens max main light, 140 lumens consistent, 260 degrees visiblity, visible from more than 2 miles away 360 degrees visibility secondary light, forming a circle of light under the rider Brake Sensor: 200 lumen light on brake and lasts 3 seconds Ambient Light Sensor: Auto adjusts light mode and output depending on ambient conditions Low power mode: Power saving flash mode triggered at 5% battery and lasts 20 min Constant and 4 flash modes, 3 brightness modes 1.5 hours runtime on highest brightness constant mode 40 g in weight USB rechargeable 2 mounting options IPX6 Waterproof