Vibration Direction Control: Automatically turn on and off to save energy. It lights up when the bike is in motion. When the lamp stops, the bike wheel lights will turn off in 0.1 seconds. How sensitive is the chip. And the light is very nice. Waterproof: Super waterproof treatment, this LED bicycle tire light is waterproof, 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: Bike valve wheel lights are made of high quality aircraft aluminum alloy, scratch resistant and waterproof. Safe LED light for bicycle wheel : With the brightest bike valve light, you will be a safety rider in the dark, it helps improve safety with increased visibility of cars. Lighting range up 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 will have the bike the best. cooler on the block. Replaceable LEDs and batteries. Motion sensor activated, auto on, no switch, more energy efficient with light and motion sensors. Features: More energy efficient with sensors of light and movement. An attractive and fun way to make your bike or bicycle even more visible to motorists. Please note there is a piece of paper in the battery box which must be removed before use. Sometimes it still doesn't work when you take off the paper, then you need to put them on the valve stem and roll them up, they will light up. Features: Color : yellow, green, red, blue. Battery: 4 Note: Quality assurance, please rest assured purchase. 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. Contents: 4 LED bicycle tire lights