Sport DirectTM Bicycle Bike LED Rear Dynamo Reflector Light 3 LED's Luggage Carrier Rear Light. Powered By Dynamo Setup Not By Batteries. Standlight Function Has An Auto Switch Off After 4 Minutes 100 Hours Burn Time, Z reflector For Extra Light And Protection Dual Cable connection (+/-) Socket, Screw Distance 80mm Conforms To StVZO German Road Traffic Standards