This device uses a PIR motion sensor to detect movement to a distance of 40ft, then emits a powerful ultrasonic whistle which scares cats away. Pre-set frequencies deter cats. Battery operated (2 x 9v), batteries not included. Option to run off mains (adaptor sold seperately). Product Barcode: 5014055001924 Product Dimensions: 200 x 125 x 130mm Product Weight: 600g Inner Quantity: 1 Outer Quantity: 12 Pallet Quantity: 480 (10 outers per layer x 4 high) Pallet Weight: 288kg Waste Packaging: Product: 19g paper, Outer: 415g paper