The PetSafe Deluxe In-Ground Fence Dog Training System includes a compact UltraLight receiver and adjustable collar that weighs only 2.5 ounces. 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. Covers up to 25 acres with additional wire and flags. Deluxe UltraLight Receiver with adjustable collar 4 adjustable levels of correction plus tone-only mode. Low battery indicator on Receiver Collar Transmitter has built-in lightning protection.