The TritTag 3XL G1 is a lantern for your keychain, suitable for 3pcs 3.0x22.5mm tritium vials (not included)
For more info on tritium vials, please see
http://renegadeproductions.blogspot.no/p/blog-page.htmlThis product will require some cleaning of the inside cavity. For information on installation, please see
http://renegadeproductions.blogspot.no/2013/05/installation.html