Ascher Ultra Bright USB Rechargeable Bike Light Set, Powerful Bicycle Front Headlight and Back Taillight. Features: - 4 lighting modes -, can be used in the rainy day - Super bright with max brightess up to 300 lumens - Lightweight design, easy to carry and storage - Flexible rubber strap design for fitting most handlebar - No wires or external 4 Light Mode Options and Discharge Time of Full-charging Headlight: 5hr (full brightness) ,10hrs (half brightness), 6.5hrs (slow flashing), 12hrs (fast flashing) Taillight: 9.5hr (full brightness) ,16hrs (half brightness), 10hrs (slow flashing), 11hrs (fast flashing) USB Rechargeable The Ascher bike light charges from your computer, wall charger or any device with a USB port using the included micro-usb cable. How to Charge 1. Attach the micro USB cable to the Bike lights micro USB input port. 2. Insert the other end of the cable into either an AC adapter(not included ) connected to a wall socket or an active computer USB port. 3. The LED indicator of both front and tail light have a red light when charging and the LED indicator will turn to be green when finished charging. Package Contents 1 X Headlight 1 X USB cables 1 X bracket strap