PKG (2) Flatlight Led Keychain Light Perfect for Pocket or Purse Michael Flatlight OK, so it can't dance, but everything else about it is terrific. This compact LED flashlight with a momentary switch weighs approximately nothing, is very bright and is only 1/4" thick x 7/8" x 2-3/8" long -- smaller than your car key. A utilitarian design in black, blue, red or green (our choice) with metal trim, it comes with (2) coin cell lithium batteries and, at one end, a small swivel with a 1" split ring.