Features: Wireless remote controller installed on the handlebar to control the right/left turn signals and main light. Multiple switchable lighting modes by pressing the buttons on the remote controller.Provides great safety during nighttime cycling. 500mAh main light and two 300mAh turn signal lights can recharge from any device with a USB port.The remote controller power by CR2032 button cell(included). IPX6 water resistance,the light can be used in ,snow or thick fog.(NOTE:Please do not soak into water for long time). Split design for mian light and turn signal lights,meets your different demands. No tools required.The lights can be easily mounted on on the front/rear of most bicycles.Just hook the light on the front fork and seat pipe with rubber rings. Specification: Battery: 500mAh(for main light) ; 300mAh(for each turning light) ; CR2032 button cell(for remoto controller) Working time: . 16-18hrs(for main light) ; 5-7hrs(for each turning light) Chagring time: . 1 - 2 (main light/turning light) Waterproof: IPX6 Main light size: 55 x 50 mm / 2.2 x 2.0 in Turning light size: 57 x 50 mm / 2.2 x 2.0 in Color: black+white material: plastic Package Contents: 2 x Bicycle Taillight 2 x Remote Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.