Mouse Trap Electric Excl Batteries (4xAA) Black plastic cabinet with metal plates inside the bottom. Light indicator when caught = flashes green for 24 hours. Uses 4 pcs. AA batteries (not included). When the battery is low, it flashes red. For indoor use. Easy to clean. Spread peanut butter or similar. inside the trap. Place the trap where the mouse moves, along panels and the like. Switch the trap (ON) green light flashes once and the trap is set.