The Victor Electronic Mouse Trap uses a high-voltage shock to eliminate mice in seconds. This powerful device can kill up to 100 mice per set of batteries (4 AA). Place a high protein bait in the provided bait cup, place in a location with high rodent activity and power on. Advanced smart circuit technology senses when a mouse enters the tunnel, triggering the system to deliver a humane, high-voltage shock. A green LED light blinks to indicate a kill. The kill chamber is conveniently removable, so you can easily dispose of the dead rodent without having to see it. Indoor use only.