It is a small device that attaches to the pets collar and a tracker that is smaller than a cell phone.
I chose this tracker over others because it was a one time purchase with no monthly charges.
The cost was only $99. which is very reasonable for the peace of mind it offers.
I purchased the Loc8tor online from Www.loc8tor.com
It is also a fun way to play hide and seek with the pets. They can no longer hide from me when it is bath time or time for pills.