The topeak redlite aero usb rear light is a great light to keep you seen on the road slim aerodynamic tail light perfect for road cycling simple tool free rubber strap mounting system the light is easily rechargeable and only takes 2 hours to fully charge which is ideal to take to work charge for the last two hours and youll be seen the whole way home the 3 super bright leds work in a constant or blinking modes to suit the conditions you are in overall this is a great rear light to own