Petsafe Wireless Dog Fence PIF 300 is the 1st Instant Fence with quick & easy installation. Just plug in your Wireless Dog Fence by Petsafe & you have an instant Pet Containment System for your dog without buryng wires.The Instant Fence sets up in minutes New PIF-300 Wireless Dog Fence Wireless Pet Containment System Featuring the New PIF-275-19 Collar Receiver for the PetSafe Instant Fence. Petsafe, the Pioneer in Wireless Dog Fences has done it again! Petsafe has redesigned the PIF-300 Wireless Dog Fence - making this Instant Fence even better! Fence system protects a circular area that can be set between 20 and 90 ft radius. At the center of the system is the transmitter.