Vibration control: turns on and off automatically to save energy. It lights up when the bike is in motion. When the lamp turns off, the bike wheel lights will turn off in 0.1 seconds. The sensitivity of the chip. And the light is very nice. 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, 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, 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. The light range illuminates up to 360, making the road more visible and improving safety even in bad weather. You will not only have a safer ride, but you will have the coolest bike on the block. Replaceable LEDs and batteries. Activated by motion sensor, automatic on, no switch, more energy efficient with light and motion sensors. Features: More energy efficient with light and sensor of movement. 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 cover of battery which must be removed before use. Sometimes it still doesn't work when you remove the paper, then you need to put them on the valve stem and roll it, they will light up. Features: Color: yellow/green/red/blue. Battery: AG10 buttons(without battery). Note: Quality assurance, please rest assured buy it. The battery must be positive-down when installing, do not remove the insulating plastic sheet inside the lamp housing, which is used to prevent short -battery and lamp shell circuits. Contents: 16 LED bicycle tire lights Note: The data is all measured manually, please allow 1-3cm error, due to the light and display difference, there will be some color difference, the actual object received shall prevail.