The humane, natural way to keep cats and other unwanted pests out of your garden and the repellent device comes with a 2 year UK warrantyMotion activated - the unit emits a high frequency sonic sound which is irritating to cats so they move away from protected garden areas; motion can be detected up to 12 m (39 feet) awayEasy set up - mount the deterrent unit in soft ground using the plastic stake or wall mount it using a hole in the back of the deviceThe Defenders Mega-Sonic Cat Repeller is weatherproof with dual outer casing and rubber seals making it suitable for year-round useRequires 2 x 9 V batteries (not included) or can be mains powered using the STV612 Universal Mains Adapter and ExtensionDetects and deters cats from gardens Motion activated repeller that gives an ultrasonic sound uncomfortable for cats Modular mounting stake included or wall mounting for easy and secure set up Dual outer casing with internal rubber seals for guaranteed water resistance year round 100 square metre coverage area Optional battery or mainspowered using 9v universal repeller adaptor (STV612)