LED Safety Warning Bike Tail Light USB Rechargeable Bicycle Rear Lights Flashing Taillight 7 Color Waterproof Bike Accessories Classic model: 750mah , There is no intelligent mode,Can only be installed on the seatpost. Upgrade style:600mah There is an intelligent mode, that is, when riding is braking or slowing down, it will change from the light you choose to red, thus reminding vehicles or pedestrians behind you to keep a safe distance to achieve the purpose of safe riding. When you ride normally, it will return to the light you choose. There are two installation modes (seat tube and cushion) for the upgraded models, and the installation mode for the Upgrade style-B is magnetic attraction. LED Safety Warning Bike Tail Light USB Rechargeable Bicycle Rear Lights Flashing Taillight 7 Color Waterproof Bike Accessories RGB 7-Colors 14-Light ModesThis tail light has 7-colors and 14 light modes,Fast flash mode( RED,BLUERED)Monochrome is always bright mode(RED,WHITE,PINK,GREEN)Breathing mode(REDBULEGREENPINKYELLOW-WHITE,step-by-step change)(RED,BULEGREENPINKYELLOW ets,Many types, change at will). Ultra Bright LED& HeadlightA high-brightness COB light source is used to achieve an amazing brightness of 160 lumens. You can also use it as a headlight by change to white light. USB Rechargeable Long Llife BatteryBuilt in 300 mAh Polymer lithium battery and Energy-saving designs, the rear bike light run time can be up to 10 hours. The taillight can be easily charged by charging cable via computers, chargers or power bank. IPX6 Waterproof & Shock Resistant Rear light cover with thickened silicone pad case, not worry about the light will get wet by rain. Has excellent vibration resistance, can be used for any terrain. _x000D_