Innotek Ultrasmart In-Ground Pet Fencing System

Description

Underground dog fence by Innotek (now Petsmart).   Should cover at least an acre of property (ours covered 1/2 acre).  We don't have the wire as we re-used it for a dual collar system.  Wire for fencing is available at most hardware stores.
This worked extremely well for our single dog....but then we got another dog and it cannot be expanded to accommodate a 2nd collar.
This line has been discontinued so replacement parts, etc are not available.
Collar has some wear and tear.  Charger is sensitive and needs to be properly seated to charge but it does charge well and lasts for 4 or 5 days.   I always made sure it was working by putting it on my own arm and have it connect to the fence before putting it on the dog.  The beeps would scare the dog as it cycled through a quick test.
Lots of settings for strength of correction and beeps to warn them.
This is a a complete system minus the fence wire.
Message for any details I'm leaving out.