Built-In LED Light to help locate misplaced items in the dark Works up to 60 ft. away - through walls and floors Includes Transmitter， Base， (2) Key Fobs， and Instructions Key Fobs Require (1) CR2032 Battery Each (Included) Tramsmitter Requires (2) AAA Batteries (Sold Separately) "FIND ITEMS WITH THE PUSH OF A BUTTON!" Helps you quickly and easily locate your keys， bags， eye glasses， remote control， wallet， anything you can attach the key fobs to!