Vibration control: turns on and off automatically to save energy. It turns on when the bicycle is in motion. When the lamp stops, the bicycle wheel lights turn off in 0.1 seconds.The sensitivity of the chip.Andthe light is very pleasant. Waterproof: Super waterproof treatment, this LED bicycle tire light is waterproof for life, even in rainy days, you can use it with confidence. Easy to Install: This valve light can be easily installed and removed as the pictures show, just mount it on your motorcycle, bicycle and car in seconds and also remove it in seconds. High Quality: The bike valve lights are made of aircraft grade aluminum alloy, which is scratch resistant and waterproof. Safe LED Bike Wheel Light: With the brightest bike valve light, you will be a safety driver in the dark, it helps improve safety with increased visibility of cars. Light Scope Lightsup to 360, which makes the road more visible and improves safety even in bad weather. Not only will you have a safer ride, but you'll have the coolest bike on the block. Replaceable LEDs and batteries. Activated by motion sensor, automatic on, no switch, more energy efficient with light sensorsand movement. Features: - More energy efficient with light and motion sensor. - An attractive and fun way to make your bike or bicycle even more visible to motorists. - Please note that there is a piece of paper in the battery case that needs to be removed before use. Sometimes it still doesn't work when you take the paper off, then you have to put them on the valve stem and do itroll, they will light up. Features: - Color: yellow/green/red/blue. - Battery: 3 AG10 buttons (included). - The battery must be positive downward when installing, do not remove the insulating plastic sheet inside the lamp housing, which is used to prevent short circuit of the battery and the shell of the lamp. Content: 4 LED lights for bicycle tires