Using new Chip On Board (COB) technology, the Blinder Front Bike Light produces a punchy 200 lumens and is brilliant for attracting attention on the road or trail in all light conditions. Blinder is one of Knog's most individual front bike lights ever, adding serious personality to you ride Features: Be seen from up to 450 metres away Easy On, Easy Off - Blinder fits bars and seat posts 22 - 32mm in diameter, and head tube profiles with a circumference of up to 7.9 in using the additional large silicone strap Charge Indicators - When your Blinder is running low on battery, a red LED will light up next to the button. This ring will turn green and then turn off once the Blinder is fully charged Integrated USB Connector - No charging cable is required. Blinder's integrated USB-A connector plugs directly into USB ports, and charges in just 4 hours Blindingly Bright - With 200 lumens of output, Blinder is a seriously bright option for any cyclist. Efficient Chip on Board (COB) LEDs provide maximum brightness for up to 90% of the battery burn time Specification: Bulb Type - Chip On Board (COB) LEDs Light Output Max - 200 lumens Run Time - Max Steady: 2.5 hrs, Eco-Flash: 60 hrs Charge Time - 4 hours Waterproof - Yes, IP67 Rating Light Modes - 8 Fits Handle Bars - 22 - 32mm+ diameter, plus head tubes to 7.9 inches Rechargable - Yes (integrated USB-A connector) Dimensions - H: 43 mm x W: 43 mm x L: 46 mm Weight - 34 grams Low Battery Indicator - Yes Strap Material - Medical Grade Silicone Operating Temperature - -20 to 50 °C / -4 to 122 °F Optimum Charging Temperature - 20 to 22 °C / 68 to 72 °F (Room Temperature).