Ultra Bright Smart Bike Tail Light - Auto On/Off Bicycle Brake Light with USB Rechargeable & IPX6 Waterproof Design for Day/Night Safety - Perfect for Commuting, Road Cycling, and Mountain Biking

Automatic Mode Introduction： Switch to auto mode： Auto off during daytime (designed for energy saving), only when the bike brakes, it will turn on immediately for 3s to alert other road users.Auto turn on at night, during sports. When the bike brakes, it will be on the brightest state for 3s.It will turn off the light auto when it is in 45s stationary state (when you go home, don't pay attention to it, it will turn off the light by itself). Manual Mode Introduction： Switching to manual mode: Manual mode requires a long press on the front switch to turn on or off, it will keep flashing (you can switch the flashing mode). When the bike brakes, the bike taillight will immediately illuminate with the brightest red light for 3 seconds to alert other road users. Inertia Principle of Brake Light The intelligent brake light will keep flashing in the motion state and will come on when the brake light is affected by the external force of braking. The motion stops when the brake is applied, but the person or the light still has forward speed inertia, both the person and the light will tilt forward some before stopping, and the brake light will sense this external force and light up. Test observations should be made while riding (do not simply shake the bike head). Record observations by means of video. [After Sales] If you need any help, please feel free to ask your questions with us. Features: Size: 44x34x28mmWeight: 28gLamp: Highlight led bulb fresnel lens lampshz`adeBattery: Rechargeable, 420 mAhMaterial of Shell: Aluminum AlloyMaterial of Rack: Aluminum Alloy+PlasticStandby Time: 6 monthCharging Time: 3 hoursIPX6 Waterproof (Dustproof / Rainproof / Splashproof / Short Time Immersion)6 Light Mode Switch：STEADY ON / FAST FLASH / SLOW FLASH / RHYTHM FLASH / BREATHING FLASH / ECO FLASH. Highlight led bulb fresnel lens lampshade The lens designed by fresnel principle is matched with 20 high-brightness LED lamp beads to creat a high-brightness and soft light effect without dazzling With Type-C Charge Port Red light: ＜20%Blue light: 20%-70Green light: >70%Fully charged in 2 hours and 20 minutes,Brightest duration is 10.5 hours, longest duration is 33.5 hours Filter rocker and small bumps The optimization program algorithm can filter small shaking motion and small bumpy road sections. However, the brake light warning will still be activated if the pit and damping belt are too large. Electric Bike Horn Bike Skewers Quick Release Axle Bike Computer Stem Top Cap Mount Bike Handlebar Grips Bicycle Chain Breaker Splitter Tool Buying Options Buying Options Buying Options Buying Options Buying Options Customer Reviews 3.8 out of 5 stars 117 4.4 out of 5 stars 16 4.0 out of 5 stars 15 — — Color Black,Red,Blue,Yellow Black,Red,Blue,Gold Black,Red,Blue Black, Red Black