Oumers Bike Spoke Light, Spokelit Bicycle Wheel Lights, Bike Flash Lamp Bulb Cycling MTB Wheel Tire Valve Spoke Light, Used for Night Safety and Warning, Best Gift for Christmas Easy to install. Press it onto spokes of your wheel and slide toward rim until fit is tight, and it then remains securely in place. No tools required. Fueled by efficient LED, device has two illumination modes, steady glow and continuous flash Safety guaranteed. The rgb light can be used for safety and warning Highlight the personality. For vocational rider or casual cyclist, show your cool personalities. Stable. Remain securely locked in position, even during off-road use.