The Useless Box Fully Assembled (Black) - The Original Useless Box Also Known As the Useless Machine or Perpetual Machine ENDLESS FUN: A totally useless box that provides endless fun! With this perpetual machine every time you flip the switch on, a little finger pops out and turns itself off! EXCLUSIVE VERSION: Exclusive Red LED included. Make your box glow red! A professional looking but incredibly funny desk gadget, a desk novelty that won't be forgotten. FULLY ASSEMBLED - Save yourself the trouble of putting the Useless Box Kit together and have us do it! WHAT'S REQUIRED: Requires 2 AA Batteries (Included!!).