New in Box. JUSTPET Wireless Dog Fence Pet Containment System For 1 Dog. Electric Boundary Container 1000 feet with adjustable range control, consistent signal and randomly correction. 20 Included in Box: Wireless fence main unit, dog collar receiver, 21 Training flags, test light, 2 power adapters, 2 charging cables, 2 wireless fence main unit wall mounting screw (2 sets), 4 conductive post and manual. 1`1