This Little Light Of Yours This little light fits on your keychain (it even has a small ring of its own), takes up no more room than a key, and lets you see the keyhole or read menus in dim boites. The white LED is powered by (2) included and replaceable button-cell batteries and is housed in a plastic/wire oval 1-3/4" x 1-3/16" x 3/8" with a momentary push-button switch. We"ll pick a couple for you (You can share!) in black, aqua or magenta.