The item is a pack of 4pcs LED lights made of silicone. They can be installed in seconds without the need for any tools or other equipment. Each of our lights feature three specific modes of use-high, low and strobe, can be easily seen. These ultra bright led lights feature two lithium ion batteries and offer visibility up to a . Features - ColorAssorted Color - Material: Silicone. - Size: About 3 * 4.7 cm/ 1.18 * 1.85 inch(L*W). - Powerd by: AG10 batteries for each light. - 4 kinds of : full light, flash, slow flash, off, according to your actual needs can quickly. - Water resistant shower proof design, not afraid of rain flooding. - Install or remove without any tools you can get 3 seconds. - design, easy operation. - All use of light 45 to 70 hours. Package list: 4 * Light Front and Rear Silicone LED Bike Light Set 2 High Water Resistant Headlight