Haunted Doorbell is made of plastic and has 3 sets of sounds: a howl, scream groan or screech.  Requires (2) "AA" Batteries (included). For doorbell use just place the black box on top of doorbell chime and turn switch to "ON" position. For Motion Activation - place black box with the motion sensor hole facing direction where the movement will occur. Turn switch to "Motion- Activation" setting. Haunted Doorbell is a trademark of Tekky Toys. Copyright (c) 2008 Tekky Toys. All Rights Reserved.