Material: The bike light made of silicone and high quality LED lamp beads; Durable and not easy to damage; Suitable for any guaranteed bike, mountain bike, big road bike, city bike, or any bike including kids bike and so on. Three switching modes: front cycle light or rear light can support full light, fast flash and slow flash mode. These three modes help or alert other drivers, drivers and walkers when you are driving in low light or total darkness. Feature: This bike light is durable and not easy to damage, easy and quick to install, without tools, waterproof and leach-free - not afraid of rainy weather; Add a light to your bike, backpack, helmet or other area for maximum safety. Easy to Install: The elastic silicone buckle with good elasticity, which fits snugly on seat posts, handlebars, seat supports, backpacks, helmets and stretch in many sizes to keep the light safe and firm, easy to install and fix without that tools are required. Package includes: 8-pack bike lights are each 4-pack front cycle light and 4-pack rear light, each bike light has 2 X CR2032 batteries (note: the battery is already installed); The bike Light Red Silicone is red light and Black Silicone is white light. Product Description Package include: 8 Pack Bike Light 4-pack front cycle light and 4-pack rear light Using two CR2032 button batteries for each light; Note: The battery is already installed. All the sustainable use of light 35 to 70 hours Scintillation Sustainable use of 160 hours The Light Red Silicone bike is red light and Black Silicone is white light. One-touch switch design, easy operation Easy and quick to install with no tools required Anyone can assemble this taillight in less than a minute.