PetSafe® Stay & Play® Wireless Fence with Replaceable Battery Collar

Wireless Boundary - Safely keep your pets in the yard with no digging and no wires to bury; sets up in just 1-2 hours Adjustable Boundary - Covers up to 3/4 acre (5 ft - 105 ft diameter) Waterproof Receiver Collar - For pets over 5 lb and fits neck sizes between 6-28 inYou may also like PetSafe Wireless Fence Extra Transmitter, Increase Your Existing Wireless Fence Boundary.