One of the most popular keylights in the world with a super-brigh white LED light. Keychain meausures 1 1/2 inches. Takes 3 LR1130 batteries.Think outside the box with this rectangle keylight! The rectangle keylight with 1 1/2 inch chain is one of the most popular key lights in the world with a super bright white LED light. This item has 3 LR1130 batteries included for added convenience. Keylights are a great giveaway for car dealerships and rental companies.