Ensure that your pet stays safely in the yard with the PetSafe Basic In-Ground Fence. This fence includes a transmitter with power adapter and mounting bracket, one receiver collar, a test light tool, operating and training guide, 50 boundary training flags and 500 feet of boundary wire. The PetSafe Basic In-Ground Fence covers up to 1/3 of an acre with the included wire, but can expand to 10 acres with additional wire (not included). The fence features four adjustable levels of static correction, a tone-only mode, anti-linger prevention and progressive run through prevention. The waterproof receiver collar has a low battery indicator and is designed for use on dogs 8 pounds and up or neck sizes 6-28 inches.