Combining lightweight design carefully considered beam angles powerful light output and a unique mounting system ndash the blinder road 400 front bike light is one of knogs most powerfully perfect road lights ever. Blinder road was first developed in 2012 and has been a knog classic ever since. Now updated and upgraded it's more practical powerful and loved than ever before. Features powerfully bright 400 lumens advanced leds and optics purposeful angles optics and a variety of flash patterns make the blinder road 400 perfect for road riding unique fastening system utilising silicone straps combined with a polycarbonate clip system blinder road adapts to the many various configurations required of todays road cyclists integrated usb charging the light is charged via integrated usb which means so it does not require additional cables to charge from a usb port as well as no need for single use batteries intuitive functionality blinder roads buttons are at the perfect angle to be easily accessible to the rider and they're big enough to be used while wearing gloves specification bulb type leds max lumen output 400 lumens light modes 4 high 4 low aero bar compatible no low battery indicator yes fits bars 22mm to 28mm and 29mm 35mm run times high 8 hours low 1 hours charge time 4 hours rechargable yes integrated usb a connector weight 70 grams dimensions h 63 mm x w 30 mm x l 53 mm waterproof yes ip67 rating operating temperature 20 to 50 degc 4 to 122 degf strap material medical grade silicone optimum charging temperature 20 to 22 degc 68 to 72 degf room temperature