Busch & Muller LED Rear Light ´´M? E´´ 5-15V DC, fender/stay attachment, with German approval mark Very small E-bike rear light, round,19mm Ø, 20,5mm long, design housing, aluminium, with connecting cable.Specifications:- StVZO conform: yes- Application: bike- Design: rear light- Power supply: E-bike battery- Illuminant: LED- Attachment: stays, fender- Current type: DC- Operating voltage: 5,0, 6,0, 6,5, 8,0, 12,0, 15,0 V- Material: aluminium, plastic- Weight: 0,020 kg.