PetSafe Radio Fence Deluxe Pet Containment System ()

FEATURES The Deluxe Radio Fence incorporates all the benefits of the Standard Radio Fence plus:Five adjustable levels to fit the sensitivity of your dog. Low battery indicator.Anti-Linger: doesn't allow the dog to hang out right on the border and run the battery down. Run Through Protection: automatically ramps to a higher level if the dog is running toward the border at a high rate of speed.