Before moving to my new apartment, I purchased a "Tabcat" Loc8tor for my cat Mickey. She is an outgoing, curious little bundle of energy most of the time. She is allowed to go outside and usually comes back when called. She has made me late for my afternoon shift a few times every year. Anticipating any problems arising from moving to my new location, I had attached the "Loc8tor" to a collar (which she initially would not tolerate) but now wears without any resistance from her,...and not only have I found her several times before leaving for work, but she now comes without hesitation just when activating the handheld unit, as it emits it's low sounding beep on the collar. Great device...the lights that light up on the handheld unit are very accurate and this little device is worth every penny. Thank you for making this device.