HJH&reg; Turns Itself Off Useless Box Leave Me Alone Machine Fully Assembled in Real Wood Fully assembled - save yourself the trouble of putting the Useless Box Kit together. Turn the useless box on, and it turns itself off. Material : Real wood Requires 2 AA Batteries (not included). Dimensions: Approx. 15x9x7cm; Weight: Approx. 250g.