This taillight will get you noticed! This taillight has a unique design and provides excellent visibility on the road. He use the energy-efficient LED that provide 15 burning hours. The tail light is easy to operate with the push of a button and is rechargeable with the included USB cable. The high-efficiency LED burns very brightly with a wide beam angle Specifications: Color: black Material: plastic Dimensions: 5.5 x 3 cm (L x W) Lighting type: LED Mounting: seat post Approved: StVZO (German road traffic regulations). Due to the elastic band, this rear light is suitable for a seat post with a diameter of 20 to 35 mm. Contents: 1 Rear light 1 Elastic 1 USB cable