This is the device we bought. DH bought the 9v adaptor at WalMart much
less expensive than the one at Radio Shack. He put two cats in the room
at different times and each one ran away immediately
http://www.emrktstore.com/pet_supplies.html?SC=google
Unfortunately, that won't answer my current problem.
Our old Siam boy died in December, the lone cat out Siam girl was
miserable and lonely.
So, we brought home a beautiful (neutered) halfgrown tiger from the
local nokill rescue.
She hated him and he was miserable and lonely.
DH went back to the rescue and brought home his brother.
Now, we have a pair, we call them "the wrecking crew", who are great
together, and one who is very needy (although she and the new boy are
becoming friendly) and wants to be close to us at night.
The problem is that the "crew" like to tear around all night and wake the
three of us (DH, me, Siam girl) up all the time. I know they'll calm down
eventually cats usually do about the second year but . . .
I need to keep her in, them out, and get a decent night's rest.
Anyone who is owned by cats knows that simply closing the bedroom
door will ~not~ solve the problem!