The IF-100 Wireless Pet Fence Transmitter is the main transmitter component of the PIF-300 Wireless System.  The IF-100 can be ordered as a replacement for an existing system or you add this transmitter to an existing system to create an overlapping - larger containment area.

Note:  By adding extra IF-100 transmitters to a PIF-300 Wireless System, you create extended areas of containment area.  This allows you to dramatically increase the effective area for pet containment.  This item does not come with any receiver collars.  The PIF-300 system uses the  PIF-275-19 receiver collars which can be purchased separately.