Mini LED Bicycle Tail Light Usb Chargeable Smart Brake Lights 5 Modes Safety Warning Motorcycle Helmet Backpack Lamp OOTDTY   100% brand new and high quality Features: Adopt high brightness SMD LED , high brightness and long life. Using high quality lithium polymer battery, 380mah With smart brake sensing function. High-performance accelerometer chip,sensitive . Adopt high-quality light control chip and algorithm to automatically switch the light source according to the brightness of the environment. It meets IP64 protection level and can adapt to all kinds of complicated outdoor environmental are available. Multiple modes and brightness available. LIGHT MODE: *Single Press the button to switch the modes: strobe- > slow strobe->Meteor->windmill->Breathing flash , according to this cycle. *Turn on the light: Press the light button at "OFF" mode, turn on the light. The light mode is the one that before it was turned off last time. *Turn off the light: Press the button 1 second, it will turn off. SMART BRAKE MODE: *Quick double press the button enter into smart brake mode, indicator will light on. *In the smart brake mode, when the product senses that the bicycle has braking behavior, all the lights will enter into strong light mode to remind the cars behind to pay attention, and the strong light mode will last for three seconds. *In the smart brake mode, when the product senses that the bicycle is at rest for ten seconds, it will extinguish all LEDs and enter into sleeping state to save battery power, and once again sense the movement of the bicycle, it will return to the original light mode when it moves. *In the smart brake mode, you can exit the smart brake mode by double-clicking the button quickly. specification: Housing material: PC Engineering plastics. 6063 Aluminum alloy. Battery: Rechargeable Lithium polymer battery. Battery capacity: 380mah Brightness: 15Lm. Use time: Strong light for 5 hours, other than 10 hours Color:black, red, blue, titanium, silver Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 * Bike Tail light 1 * USB cable 1 * Bracket