KEEPS DOGS SAFE, EVERYWHERE: The Halo Collar 4 GPS fence system keeps your dog inside the boundaries created in our app to prevent your pet from leaving. See up-to-date, real-time location tracking at all times, activity tracking, instant recall & more SUBSCRIPTION REQUIRED: Your collar needs GPS services and cellular data to create, edit, and use the wireless dog fences and GPS tracking. Pack Membership Plans start at $9.99 per month. Select a plan after purchase GPS COVERAGE: The redesigned Halo Collar 4 is the first and only wireless dog fence with dual-frequency GPS. The GPS fence combines L1 & L5 GPS bands for accurate locations that aren't impacted by obstacles, even in urban or bad signal areas FITS BIG & SMALL DOGS: A new, small, lightweight design. Made for small, medium or large dogs, 10 lbs and up, 5 months and older. The adjustable dog collar allows for a custom fit to your dog’s exact neck size, from 8 inches to 30.5 inches 40+ HOUR BATTERY LIFE: 40 hours (or more) between charges. Plus, more rugged, with improved waterproofing, better wireless performance, a louder speaker, stronger vibrate, & improved static CUSTOMER SERVICE & DOG TRAINING: Download the app to create & store GPS fences. If you need technical help on battery life, collar sizing, the Halo app, or dog training, contact the Halo Dog Park, our customer service team, for live 1:1 support Protect your dog with the Halo Collar 4 GPS Wireless Dog Fence, an updated version of the Halo Collar 3. Build your fences in the Halo Collar app and see up-to-date, real-time location tracking that lets you know exactly where your pup is at all times.

With the Halo Collar 4, you don't need an e-collar, an invisible dog fence, electric fence, or have to set up a physical dog fence. Within the app, you can easily set boundaries and create GPS fences for tracking your pet (or pets) using your phone.