This is a simple locket designed to work with Lectrify LEDs and battery holders.  Both can be purchased at http://lectrify.it

Direct links:

Battery Holders: https://www.lectrify.it/products/battery

LEDs: https://www.lectrify.it/products/ledmultipack

Conductive Tape: https://www.lectrify.it/products/conductive-tape