PetSafe In-Ground Fence for Dogs and Cats over 8 lb., Waterproof, with Tone and Static Correction For dogs 8 pounds and up, or neck sizes 6-28" Covers up to 1/3 acre with included wire. Expand containment size up to 10 acres with additional boundary wire (500 feet included - additional wire available separately) Deluxe UltraLight Receiver collar with 4 adjustable levels of correction plus tone-only mode for training Includes: Transmitter with Power Adapter, Deluxe UltraLight Receiver, Surge Protector, Operating & Training Guide, Battery, 500ft of Wire & 50 Training Flags, Test Light Tool