There is a rear light for riders of bicycle to make them safe at night. It has three flashing mode to catch people's attention and the function of remote control makes the use convenient.Features:Wireless remote control and bright LED tail light are combined perfectly together to get drivers attention from blocks away due to it's turn signal and various flashing modes.To allow drivers keep a safe distance from getting too close the mode is a big help it protects you by providing a safety range with others.2000mAh USB rechargeable battery allows the rear light work continuously up to 8 hours in flashing mode.The light detection system would turn off the lights automatically during the day and turn on at night.There are three flashing modes flashing constant and cross-flash.Two way to fix the rear light the saddle bottom or the standpipe above. Specifications:Brand: MeilanMaterial: PC + ABSColor: BlackBrightness: 80lmWaterproof Grade: IPX4Taillight Size: 110 * 27mm / 4.33 * 1.06inRemote Control Size: 45 * 35mm / 1.77 * 1.38inPackage Weight: 285g / 10.05ozPackage Size: 13.7 * 12.9 * 4.3cm / 5.39 * 5.08 * 1.69inPackage List:1 * Rear Light1 * Remote Control1 * Charge Cable1 * Tube Mount with Screw2 * Seat Post Mount with Screws1 * User Manual