This In-Ground Fence™ System is one of the most affordable ways to keep your dog safe and secure in his own backyard. From the Receiver Collar, he’ll hear a warning tone as he nears the boundary you established followed by a quick electrical stimulation if he attempts to cross it. The lightweight, adjustable collar is the perfect complement to the new-found freedom your dog will experience on his own turf.   For large (>18 kg) dogs we advise to use PetSafe In-Ground Fence system PRF-3004XW-20 [https://www.salesdepot.eu/en/petsafe-in-ground-fence-system-prf-3004xw.html]   FEATURES * For outdoor use only * For dogs 3.6 kg and up * Fits neck sizes 15 - 71 cm * 4 adjustable levels of static stimulation * Tone-only mode alerts your pet with a beep * Over Stimulation Protection: Stimulation stops after 30 seconds * Covers up to 13 ares (1/3 acre/0.13 hectares) with included boundary wire * Expandable up to 400 ares/10 acres/4 hectares (additional wire and flags required) * Add an unlimited number of pets with additional in-ground Add-A-Dog® Receiver Collars * Run Through Prevention- Static Stimulation increases if your dog tries to run through the boundary zone * Waterproof Receiver Collar * Collar uses 1 x 6 Volt battery (included) * Battery usually lasts 1-3 months SYSTEM INCLUDES * Transmitter with Power Adaptor * Deluxe UltraLight™ Receiver with adjustable collar for neck sizes from 15 cm to 66 cm * Operating and Training Guide * 150 m of Wire and 50 Flags * Test Light Tool * Battery (RFA-67D-11)