Features1Easy to install, tool free to install, disassembly in 2 seconds, no cutting, just along the wire on the wheel to install. 2Switch design, one key switch, constant light to flash, optional conversion. 3Helps you stay visible on dark roads and ensure the safety of riding. 4A variety of color mix and match, can choose freely, meet your different demands. 5Adopt high quality hard silicone material, firm and durable, provide longer service life.SpecificationItem Type: Bike Spoke LightMaterial: Hard SiliconeSize: Approx. 12.6x3.5cm/ 5.0x1.4inWeight: Approx. 28g/ 1.0ozBattery: 1PCS 200mAh CR2032 button battery (shipped with built-in battery)3 Light Modes: constant light, fast flash, slow flashBattery replacement method1: Open the light cap and remove the light2: Push the old battery out with your fingernails3: Put in the new battery (pay attention to the positive and negative terminals)Installation: spokes light as the name implies is the light installed in the spokes, first put the light on the spokes, and then turn the willow leaves on both sides to the other side and shake with your hands to see if they are firm.Package List1 x Bike Spoke Light