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 ndash 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 degc 4 to 122 degf optimum charging temperature 20 to 22 degc 68 to 72 degf room temperature.