Infa red collar key infa red collar key for staywell 500 cat flapadditionai infa red key with collar amp batteries available in the following colours blue green pink and yellowadditional collar keys of the same colour must be purchased for multiple cat ownersnbspplease note you cannot use any colour key with your infra red cat door if you want to use more than one key then all the keys in use must be the same colour as the key originally supplied with your cat doorpackaging does vary with this p