He may be stubborn, but that doesn’t mean he can’t be kept safe and secure. To help manage your strong-willed dog, this In-Ground Fence™ system and Receiver Collar comes equipped with five adjustable levels of electrical stimulation, including a tone-only plus vibration mode. The adjustable Receiver Collar is specially designed for hard-to-train dogs of every size.   FEATURES * For outdoor use only * For dogs 3.6 kg and up * Fits neck sizes 15 - 71 cm * 4 adjustable levels of static stimulation * Vibration option, perfect for hearing impaired pets. * Tone-only mode alerts your pet with a beep * Over Stimulation Protection: Stimulation stops after 30 seconds * Covers up to 13 areas (1/3 acre/0.13 hectares) with the included boundary wire * Expandable up to 400 ares/10 acres/4 hectares (additional wire and flags required) * For stubborn or hard-to-train dogs * Add an unlimited number of pets with additional in-ground Add-A-Dog® Receiver Collars * Waterproof Receiver Collar * Collar uses 1 x 9 Volt battery * The battery usually lasts 1-3 months * Good/low battery indicator SYSTEM INCLUDES * Transmitter with Power Adaptor * Waterproof Receiver with an adjustable collar for neck sizes from 15 cm - 71cm * Operating and Training Guide * 150 m of Wire and 50 Flags * Test Light Tool * 9 Volt Battery (PAC11-12067)