The Knog Plus Rear Bike Light is a super-bright and versatile light that easily mounts on your bike or clips onto clothing, helmets, backpacks, and more. Whether used as a primary or secondary bike light, it's an ideal choice for commuters and road cyclists. Visibility up to 450 meters Integrated USB-A connector for cable-free charging Waterproof with IP66 rating Mountable or earable Ultralight at just 17 grams Up to 40 hours of runtime Light Modes Lumens Runtime Steady 20 2 hrs Strobe 20 8,5 hrs Pulse 20 4 hrs Fancy Flash 20 10 hrs Eco Flash 20 40 hrs Weight17 g