Dresco USB rechargeable COB LED rear light This compact rear light produces a powerful and bright beam of light through the ten COB LED lights. The lamp has four different light modes and a flashing function. Easy to attach to the seat post or chain stay with the included adjustable (25.4 to 31.8 mm) rubber strap. You can fully charge the lamp within three hours using the USB to micro USB cable. Specifications: Color: black Material: plastic Type of light: COB LED Light intensity: 60 lumens Power supply: battery (charging with USB) Mounting: seat post or chain stay (diameter from 25.4 to 31.8 mm) Charging time: 3 hours Contents: 1 Rear light 1 Mounting strap 1 USB cable