Our premium bicycle lights can be installed in seconds without the need for any tools or any other equipments. Add a light to your bike, backpack, helmet or other areas for maximum safety. We've carefully crafted Classic Glow Bicycle Lights using durable silicone alloy so they can stand up to weather, road use, and even low-impact drops. They're also waterproof. These ultra bright LED lights feature two lithium ion batteries and offer visibility up to a half mile. This helps other riders, drivers, and walkers spot you when riding in low light or in complete darkness.