LED Light is helpful when trying to fill your tires in the dark. Proper tire inflation is an important safety issue, as well as helping to improve gas mileage. Comes with 3 button AG13, cell batteries, that are replaceable. Plastic tab prevents activation of battery and needs to be removed before first use. Assorted colors per order: Minimum of 50 per color. Imprint color must stay the same on all. 1 1/2" W x 3 1/2" L x 7/8" H