Innotek Multivet Ssscat Automated Cat Deterrent Kit and 2 Unscented Repellent Refills Motion detector with 1 can of spray + 2 refill cans of 4.5 oz Ssscat Repellent (Total of 3 spray cans) Repels cats for up to one meter HFC134a gas is a harmless, scentless spray used to surprise the cat intruder without leaving any residue 100-percent safe for humans, animals and the environment Requires no training