German StVZO optimized lens with wide light spread. Two high output LEDs provide 12 lumens. IPX7 water resistant rating. Composite matrix construction. E-bike compatible (6v input, 0.4w / 12v input 0.8w) easily plugs into batteries from top makers including Bosch, Shimano and Yamaha. Stainless Allen key hardware and 130cm long power cable included. 50 and 80mm mount spacing.