"Full Description:\nIntroducing Halo Collar 3: the most accurate GPS dog fence ever created. Halo always keeps your dog safe, anywhere in the world, with virtual fences, advanced real-time GPS tracking and activity monitoring — all managed through the user-friendly Halo app. With multiple customized feedback choices, this tool helps you keep your pet safe inside any boundary. The Halo Collar app also helps you track your furry friend’s activity levels on a daily, weekly, and monthly basis. Plus, Halo’s training program is developed by renowned dog behaviorist Cesar Millan to help you build an amazing bond with your dog and support positive habits.<br />\n<br />\n<strong>*A monthly Pack Membership Plan is required to activate your Halo Collar.</strong>\n\nFeatures:\n\u003cul>\n\u003cli>Sizing Information - The Halo Collar fits dogs 20+ lbs with a neck size of 11"-15" for Small and 15"-30.5" for Medium/Large. If your dog is in between sizes, we recommend getting the larger size. Only for dogs 5+ months. Your Halo Collar comes with step-by-step instructions for how to tailor the collar to your dog for a perfect fit.\u003c/li>\n\u003cli>Customize Feedback to Suit Your Dog - Our wireless fence system can provide sound, vibration, and static feedback—whatever is best for your dog. Paired with your other dog training tools, there's nothing your dog can't do with Halo.\u003c/li>\n\u003cli>Easy Setup & Training with the Halo App - Instantly create and store up to 20 GPS wireless dog fence perimeters at the touch of a finger in the Halo app. Video tutorials guide you step-by-step through getting your wireless dog collar fence system up and running, plus built-in dog training designed by Cesar Millan.\u003c/li>\n\u003cli>Real-Time Tracking Keeps You in the Know at All Times - The most up-to-date real-time location tracking of any GPS dog collar available lets you know exactly where your pup is at all times. The wireless dog fence system also tracks activity and resting time, unlike a standard dog training collar.\u003c/li>\n\u003cli>Safety Everywhere You & Your Dog Go - Halo's wireless pet fence keeps your dog safely inside the boundaries that you easily define and prevent them from leaving (unlike any other wireless fence for dogs, which only notifies you when they escape). Simply draw the boundaries on your smartphone.\u003c/li>\n\u003c/ul>\n\nSpecifications:\n\u003cul>\n\u003cli>Estimated Battery Life: Up to 20 hours\u003c/li>\n\u003cli>Collar Width: 1 inch\u003c/li>\n\u003cli>Neck Size (Medium/Large): 15-30.5 inches\u003c/li>\n\u003cli>Neck Size (Small): 11-15 inches\u003c/li>\n\u003c/ul>\n"