Bike Bicycle light LED Taillight Rear Tail Safety Warning Cycling Portable Light

When it is dark, they automatically light up creating a disk-like light that appears to hover above your wheels, bring more color to your car/bike, bring more enjoyment to your drive. Safety during night driving. More energy-efficient with light and motion sensors. LED flashlight safety light with a built-in motion sensor. Rust-resistant and auto shining, 100 percent waterproof. Durable and high impact. No battery connection required – no need to connect to the vehicle battery as it has an inbuilt battery. Waterproof – The valve has a light mouth small waterproof case. It lights up itself using high-quality metal gold-plated, inner zone button batteries. Easy to install: Simply screw it onto the tire valve. Twist off your original valve cap and replace it with this valve cap LED light.