Smart Bike Tail Light, Brake Sensing Rear Lights, Auto On/Off,USB Rechargeable,Waterproof,Ultra Bright LED Warning Back Bicycle Flashlight, Cycling Safety Accessories

【SMART BRAKE SENSING & EASY to INSTALL】Automatically switch to high light mode when braking, ultra-bright for 5 secs lights warning back rider to enhance your safety. You can mount it under the saddle with metal mounting bracket or mount to the seat post with adjustable silicone strap.

【Five LIGHT MODES 】There are 5 light modes for you to choose from: (1) Fast Flash Mode; (2) Breathing Flash Mode; (3) Slow Flash Mode; (4) Constant Light Mode (5) Very Shiny Mode.enjoy your cycling as you wish, High lumen COB Led bike taillight makes you more visible, it's a perfect bike light for night riding.

【AUTO ON/OFF for BATTERY SAVING】This Smart bike tail light including Motion Sensor and Light Sensor, it will be auto off when detect in no motion after 40secs. Once touch it or detect the bike is moving, the light will auto on again.

【BRIGHTNESS ADJUSTABLE & HIGH LUMEN】This bike tail light features LED high brightness beads and optical lens for more brightness Built-in 400mAh lithium-ion battery, lasts up to 15 hours after a 2-hour full charge

【ALUMINUM ALLOY SHELL & IPX5 WATERPROOF】Made of aluminum alloy shell, this bike rear light has a nice touch and awesome appearance. IPX5 waterproof for riding in rain or shine.