This is our entry-level ultrasonic pest repeller, effective against mice and crawling insects. The Pest-Stop 500 uses fluctuating ultrasonic waves to cause auditory stress to pests. · Direct plug-in design – use almost anywhere in the home · Covers 1 room, at least 500 sq ft. Ultrasound does not penetrate walls or other solid objects and is best positioned with an unobstructed ‘view’ of the target area Fluctuating ultrasonic waves cause auditory stress to mice, rats and most crawling insects, which disrupts their normal behaviour patterns and makes it uncomfortable for them to stay in the same room as Pest-Stop 500 Safe and effective – no chemicals Product Barcode: 5014055000941 Product Dimensions: 150 x 210 x 80 mm Product Weight: 250g Inner Quantity: 12 Outer Quantity: 48 Pallet Quantity: 1152 (6 outers per layer x 4 high) Pallet dimensions: 1200 x 2000 x 1300 Pallet Weight: 310kg Waste packaging: product: 22g paper, 50g plastic, Secondary: 365g paper, Outer: 1,608g paper.