This wireless smart tail light is designed for great cycling safety, with ultra-bright LED, the motion sensing and light sensing system. The four 14000MCD LEDs powered by 2 of the most common AA batteries, are able to output extremely high visibility The Motion Sensing System would identify the braking motion, and put on braking signal, shifting from the beam to highly bright light for several seconds. With the G-Sensor, it can also identify the tilt (larger than 10 degrees) of your bike to trigger the turning signal, 2 flashing lights on the side you are turning/tilting to and 2 stay-on lights on the other side. To use the turning signal comfortably, please test the angle before a road ride. And in heavy traffic, to stop and show the turning lights by tilting it is suggested for the sake of safety. What's more, we have an Ambient Light Sensor built in working closely with the motion sensor to save battery. The lights stay off in the bright daytime and will automatically shift to flashing mode when moving motion tested in the dark night. In both day and night, it would give turning or braking signals when tilt or brake motion is identified. Either you are a pro cyclist or bike commuter, this is a great safety add-on for your bike. Features summary: Ultra brightness, high visibility. Motion sensing for: Turning signal and Braking warning. Automatic power on/off by motion and light. Distinguish day and night. Waterproof / Spill resistant Beaming mode: 3 modes Installation Options Rear rack / Seat post Weight:72g Size: 11.5*4.5*2cm House Material: PC In the box The smart tail light *1 Screw and Nut *2 (for rear rack installation) Seat post mount *1 AA dry battery *2
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