With this useless box perpetual machine every time you flip the switch on, a little finger pops out and turns itself off. Set it on your coffee table or desk and wait for curiosity to cause victim after victim to turn it on - each to be met with the little finger turning the box back off. A professional looking but incredibly funny desk gadget,a desk novelty that won't be forgotten. A totally useless box that provides endless fun! Every time you flip the switch on it. Material: Wood; Dimensions: Approx. 15.24x 9.4x 7 cm/6x 3.70x 2.76 inch; Weight: 350g; Requires 2 AA Batteries (not included).