Knog Blinder Grid Rear Light She Blinded Me With Science! Lights are useful at all hours of the day. During the day, they help you stand out to motorists, and at night, they can also help you see where you're going. The Knog Blinder Grid Rear Light utilizes a new Chip on Board (COB) technology, producing a punchy 100 lumens and is brilliant for attracting attention on the road or trail in all lighting conditions. It can be seen from up to 1, 500 feet away, features an integrated USB-A connector for cable-free charging, is waterproof (IP67 rated), and offers up to a 60-hour runtime in Eco-Flash mode. Features Fits bars and seatposts from 22 - 32mm in diameter Charge indicators to let you know when the Knog needs to be charged Integrated USB connector so you can plug it directly into a USB port100 lumens of output with efficient Chip on Board LEDs Specifications Number of LEDs A Lot Battery Type Rechargeable, Integrated USBWeight34g Water Resistant IP67 Waterproof Rated Low Power Indicator Yes Mounting Type22 - 32mm+ Diameter Tubes Battery Mounting Internal | Knog | Blinder Grid Rear Light | Black | Rear