Finally, a pet containment system designed specifically for your small dog. The new PetSafe PIG00-10773 Deluxe Comfort Fit Little Dog Fence has the smallest receiver on the market, weighing in at a mere 1.1 ounces. This is 45% smaller than the next smallest receiver on the market. The collar is 100% waterproof. PetSafe's new comfort fit design is more comfortable for your pet than the old receiver on a nylon or plastic strap. The receiver features a low battery indicator light, will let you know if your batteries need replacing. The safety shut off, shuts your system off if your pet is in it for 20 seconds. The ASIC Microchip Chip, which is the size of a match head, features 3000+ filters to prevent unwanted correction. The QuickFit buckle allows for a quick release and a perfect fit every time. The transmitter will cover yards up to 25 acres. It features an audio break alarm and light to warn you if the wire has been broken. The digitally coded signal prevents false activation ensuring only our transmitter can activate the receiver. The transmitter cover conceals the range adjustment control to prevent tampering and accidental increases or decreases in signal. The receiver fail safe shuts down the system after 20 seconds if your pet gets trapped in the correction zone to prevent over correction. PetSafe PIG00-10773 Deluxe Comfort Fit Little Dog Fence features: Five Adjustable Correction Levels to fit any Dogs Personality Little Dog receiver weighs only 1.1 ounces - 45% smaller than other receivers Audible Warning Warning Before Correction Stimulus Rising Stimulus, If your dog does not back up from challenging the fence the stimulus will rise automatically Durable 100% Waterproof 5 level Receiver Collar including tone only Low battery indicator light, will let you know if your batteries need replacing Safety Shut Off, Shuts your system off if your pet is in it for 20 seconds ASIC Microchip Chip, A chip the size of a match head with 3000+ filters to prevent unwanted correction QuickFit buckle allows for a quick release and a perfect fit every time Initial battery included Includes the New Comfort Fit Little Dog Receiver featuring: Testing tool The Deluxe Little Dog Receiver weighs only 1.1 ounces - 45% smaller than other receivers Completely Waterproof Ideal for any size yard, even up to 25 acres Audio break alarm and light on the transmitter warns you if the wire has been broken Digitally coded signal to prevent false activation. Receiver Fail-Safe. If your pet gets trapped in the correction zone, the receiver will shut down after 20 seconds to prevent over correction Transmitter cover conceals range adjustment control to prevent tampering and accidental increases or decreases in signal The only UL and CE rated system on the market Easy-to-follow manual and DVD covering installation and pet training Limited lifetime warranty