The tail light is special designed with an intelligent sensor. You are able to control signal light automatically. Super bright but not dazzling, absolutely a perfect tool for night safety cycling.,Features:,6 lighting modes, reminding passengers and drivers to keep a safe distance. ,13 lamp beads offers great visibility and safety at night.,Built-in high precision gravity sensor, switch automatically to the related signal light.,Great waterproof performance, safe to use in rain and winter weather (Tip: avoid long time exposure in rains).,Convenient USB charging with special cover design, prevents dust, rain and sundries from entering effectively.,Compact size for convenient carrying.,Good elastic rubber clip is little hurt to your bike.,Specifications:,Material: ABS,Colour: Red / White / Red + white ( optional ),Light Size:76 * 35 mm / 3.0 * 1.4 in,Light Weight: 40 g / 1.4 oz,Packing Size: 7.5 * 6.5 * 4 cm / 3.0 * 2.6 * 1.6 in,Packing Weight: 62 g / 2.2 oz,2 * Light,2 * Rubber Strap,2 * USB Cable