RN 180 Smart Bike Tail Light 180 Lumens Break Sensing Rear Light 260?? Visibility USB Rechargeable Waterproof Bicycle Taillight 8 Modes Fit All Bicycles for Road Cycling, Commuting

Transparent Optical Fiber: With a highly transparent lighting strip design, it can reach up to the max output of 180 lumens, 260-degree visibility, and 2000 meters visible range.
Ambient Light Sensor: The tail light has 8 modes: 3 constant modes, 4 flash modes, and 1 smart mode. The built-in light sensor automatically adjusts the brightness according to ambient lighting conditions.
Motion Sensor: Built-in with the latest light and motion sensors, RN 180 TL can detect the sudden stop and will increase its output to 180 lumens in a frenzy of flashes, warning fellow travelers and motorists. It will protect you day and night, move and braking.
Convenient to Use: Multiple mounting methods to fit in saddles and with different seat posts, which make you easy to operate. Memory function, battery indicator, and rechargeable USB cable are convenient for riders.
IPX6 waterproof: Feathery 1.3 oz, and exquisite case design with IPX6 waterproof rate, can be used normally in the downpour.