A SAFE, EASY WAY TO TRAIN YOUR DOG:Our wireless dog fence system uses the latest radio wave technology and offers adjustable correction levels for precise training. This wired dog fence allows you to create the border exactly where you want it to be.Give your dog the space and freedom to run around in your customized area. And train up to 2 or 3 even more dogs at once with extra training collars. COMPLETELY CUSTOMIZABLE TO FIT YOUR SPACE:In-ground invisible boundary wire is 984ft long that could set it up around your entire yard in many customizable layouts.If you have garden beds, a play area, or a pool, use the fence to keep them protected. Our electric fence for dogs even expands up to 10 acres when you purchase additional wire. you no longer have to worry about your dog digging up your garden bed or running off to the road. RECHARGEABLE & WATERPROOF RECEIVER COLLAR: waterproof collar Receiver sends a tone and vibration as your dog approaches the boundary, and moves to one of 3 correction levels that you select, based on your dog’s temperament.Let your dogs run freely while safely contained, even in rains! PERFECT FOR ALL SIZES DOGS:Each collar comes with 2 different sizes of contact points, to accommodate both dogs with short neck hair and those with long. The contacts are unique in that they come with comfort covers to help prevent irritation caused by prolonged use. And We designed it to work as an extra-large, large, medium, and small breed dog training collar. It fits dogs weighing 11-154 lbs. with a neck size ranging 8-27 inches. GUARANTEE: promise 60 days no reason to return, plus 365 day warranty. Money back guarantee if you are not satisfied. Please contact us if you have any question, we will always reply you within 24 hours.