a computer for offices and houses, the triggers are on the computer screen for your convenience, and these are all one word. listen to your secretary as she types away, or blows up your computer. or do it yourself, you can turn it on and turn it off, if only i knew how to make the screen correspond :( if you like this item you can check out my house alarm which was created before this: http://www.imvu.com/shop/product.php?products_id=10737474