Battery-operated mouse killer. On entering the device, the mouse creates a circuit by touching the metal plates on the floor of the tunnel and is killed virtually instantly. Tamper-proof design, safe to use around children and pets (excluding rodent pets). Warning light signals mouse has been caught for up to 24 hours. For use Against Mice Plastic & Metal Construction Safe to Use Around Children & Pets Warning Light Signals Capture & Low Battery 4 x AA Batteries Provide Power for up to 100 Kills Highly Effective, Quick & Humane Mess & Toxin-Free Power Cuts When Open For Safety For use Against Mice Plastic & Metal Construction Safe to Use Around Children & Pets Warning Light Signals Capture & Low Battery 4 x AA Batteries Provide Power for up to 100 Kills Highly Effective, Quick & Humane Mess & Toxin-Free Power Cuts When Open For Safety