PetSafe Wireless Fence Extra Transmitter, Increase Your Existing Wireless Fence Boundary

Expand Your Boundary - Increase your pet's play area with an extra transmitter. Transmitters boundaries need to overlap 30 ft. Portable - No wire to bury Adjustable - Circular boundary up to 1/2 acre Easy Set Up - In as little as 1-2 hours Collar Sold Seperarely - Requires a PetSafe® Wireless Fence Receiver Collar to operate Item does not work with mobile homes, structures with metal siding or structures with metal roofs