PetSafe Wireless Pet Containment System Transmitter G402-855 PIF-300 IF-100
This unit has been fully tested and works as it is supposed to, this unit has been tested twice now as this item was returned from a buyer once claiming it did not work. I am just letting you know as I am honest, You can draw your own conclusion as to why it was returned as we unfortunately live in a time where people return their used Christmas trees. As far as the unit goes, be sure to make sure you have a new battery in your petsafe collar, I tested this with a PIF-275 collar. Also this unit does not come with a power cord, You can get them on Amazon for roughly 13.00 or use a universal power cord. 
Item#1429

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