In-Ground Deluxe Radio Fence 18 Gauge Wire, by PetSafe

Innovative features like built-in lightning protection and a low-battery indicator ensure that you can enjoy the peace of mind that comes from knowing that your pet will be right where you left him.

Features:

UltraLight™ receiver with adjustable collar

Built-in lightning protection

4 levels of correction, plus tone-only mode for training

Includes 500 ft of 18g wire and 50 boundary flags (covers up to 1/3 of an acre)

Transmitter covers up to 25 acres (additional wire and flag)