SPECIALIZED FLASHBACK TAILLIGHTTHIS IS LIKE A FLASHBACKWhether you're riding in the early morning or late at night, you should have lights on the front and back of your bike to enhance your visibility. The Specialized Flashback Taillight is a compact rear light that fits anywhere. Put in on your belt, backpack, or your seatpost. The light is waterproof, so you can use it anytime, has four operating modes, has up to a 20-lumen output, and has up to 20-hour runtime. Features Built-in fabric belt clip so you can clip it to your belt or backpack Waterproof design so you can use it anytime2 to 20-hour runtime with 4 operating modes Flash Modes Mode Steady Power Flash Disco Flash Eco Flash Lumens1020145Run Time (h:min)-20:00Specifications Number of LEDs1Battery Type Rechargeable Weight-Water-Resistant Yes Low Power Indicator Yes Mounting Type Belt, Backpack, Seatpost Battery Mounting Internal | Specialized | Flashback Taillight Black