Description Energy saving: automatic lighting and no switch, lights turn on when moving, turn off when stationary and flash when driving at night. More energy efficient with light and motion sensors Water Resistant: LED ray lights are designed with a spherical cover for water resistance, you don't have to worry about rolling in the rain Safety: Improves safety by increasing visibility at night and in bad weather. Easy to install: Simply remove the bypass paper from the battery box and existing tire valve cap, then unscrew the screw cap. specification Type: Tire valve cap light Material: metal color green Quantity: 4 pieces Net weight: 25g / 0.9oz Package: 4 * tire valve cap light