Humanely and swiftly delivers a high-voltage electric charge to the rodent, killing it in seconds. No sticky messes, snapped fingers or poisons. Never touch a dead or squirming mouse again. Professional model features a patented 3-plate design that kills up to 3 mice without resetting. Green indicator light blinks for up to 7 days to signal a kill. Just open the lid and dispose of dead mice. Safe to use around pets and children. Humane kill: meets International Humane Kill standards. Quick kill: mouse dies within 5 seconds. For added safety, unit deactivates if top door is accidentally opened. Unique tunnel prevents mouse escape and decreases risk of shock to humans. Uses 4 AA batteries (not included). A set of batteries exterminates about 100 mice.