The Ultra Power Electronic Mouse Killer from The Big Cheese® is an effective and humane way to catch and kill mice in indoor areas – like the professionals use. Ergonomic electrical plates sense when a mouse enters the trap, delivering a high-voltage charge that kills in seconds once the mouse is enclosed within the unit. The Electronic Mouse Killer is guaranteed to kill mice, or your money back. The semi-transparent lid makes it easy to identify a successful kill and the catch can be disposed of by simply opening the lid – no mess, no fuss and no need to touch the captured mouse. An internal micro-switch, together with built-in safety features makes this trap safe to use in areas around children and pets. Kills over 100 mice per set of batteries.