The RADBOT™ 500 has one directive: to defend you and your bike from rear collisions. It comes equipped with a precision reflector that conforms to strict EU standards and its blazing red eye contains a 0.5 watt Japanese LED to stare down vehicles. *By popular demand, the new RADBOT™ features a switch that must be held for 1.5 seconds to turn the light on/off. This prevents the RADBOT™ from being accidentally turned on in your pocket or bag when not in use.