Remote Caller +3 Receivers. Find your hiding, trapped or missing pet. Q. What is The Cat Caller? A. It"s a remote locator created for any small animal that can wear a collar. Q. Why do I need The Cat Caller? A. To find your pet immediately when they are trapped, hiding, or missing and for peace of mind knowing that your pet is safe. Q. Can The Cat Caller be used on a pet other than a cat? A. Yes, it works on housepets that can wear collars such as small dogs, ferrets,rabbits, guinea pigs, etc. Q. How do I use The Cat Caller? A. Simply hold down the color coordinating button on the remote that matches the color of the receiver, or the red "call all" button and listen for the beeping sound and look for the flashing light. Q. What is the range? A. The Cat Caller is ideal for locating your lost pet throughout your entire house and yard, even your neighbor"s yard both indoors and outdoors. The approximate range can be up to the equivalent of a half of a football field!Q. How does The Cat Caller work? A. A wireless remote keychain transmits a unique signal to each individual receiver and another "panic" signal to all receivers at once. It works through walls, closets, indoors and outdoors in all those unimaginable places your pet likes to hide..Q. If I buy one of The Cat Caller units, will it work with another The Cat Caller keychain remote? A. Yes, all keychain remotes correspond to all receivers.Q. Will The Cat Caller help if we are a multi-pet household? A. Yes, one of The Cat Caller remotes is designed to locate up to three per household. For additional pets, combine single packs with multi-pack Cat Callers. They all work together.Q. How will I know which pet I am locating? A. Each color is linked to a specific frequency, allowing you to know which pet you are locating by color.Q. Cat Caller fit on any size collar? A. The Cat Caller adjusts to most small collars including break-away collars, fancy rhinestone collars and small dog collars.