Bicycle Smart Rear Light,Brake Activated Rear Light,Auto On/Off,All Aluminum,,USB Rechargeable,Cycling Safe Accessories Features: 【INTELLIGENT BRAKE SENSOR & EASY to INSTALL】- Automatically switches to high-brightness mode when braking,super-bright 5-second lights rear drivers to improve your . You can use a metal bracket to mount it under your saddle,or use an adjust silicone strap to secure it to your seat post. (We offer 2 bracket installation ) 【Four Light Modes and High Light Efficiency LED】- There are 4 light modes for you to choose,enjoy your ride the way you want,the high COB LED bicycle tail light makes you more visible,it is perfect for night riding Bicycle Light. 【Automatic to Save Battery】-Bike rear light with motion sensor and light sensor,it will automatically turn off if no motion is detected 30 seconds. Even if you drive in the sun,the taillight will turn off automatically because the light sensor is working. If you want to drive in the daytime and the taillight needs to work all the time,please select mode 3 and mode 4 to avoid the strong light sensor. [Brightness and Battery Display] The brightness of this bicycle taillight is adjust. In stable on mode,just press and hold the button to get the brightness you need. It has a built-in 400mAh lithium- battery and can last for 50 hours of use (will (Affected by the brightness you set) Run time full charge. Four blue indicator lights,each showing 25% capacity,no more forgetting to charge. 【Aluminum Housing & IPX6 Waterproof】-This bicycle taillight is made of aluminum alloy housing,which feels beautiful and looks great. Waterproof/dustproof,shockproof,suitable for any harsh working environment. Product Description: Package includes：1 tail light + 1 USB cable + 1 metal bracket + instruction manual Decorate the house: the design is exquisite, improve the home style, suitable for placing in a variety of home venues. Selected materials: The use of high-quality materials, environmental protection and durable. Versatile: Ideal for tabletop decoration, bookshelf embellishment, or anywhere you want to add beauty. Unique charm: Each piece has a unique charm of handmade art, easily create a personalized home environment. The perfect gift: Whether it's a holiday celebration or a housewarming, it's ideal for expressing your heart.