Wireless GPS Dog Boundary Fence Our Wireless Dog Fence uses the latest and most innovative technology to keep your dog safe and contained within your property. This system uses a GPS signal to set an invisible boundary around your property to stop your dog from escaping. Other invisible fences systems rely on radio frequency signals via a transmitter which makes them prone to potential signal interruptions, particularly in busy urban environments. This signal can be disrupted by metal objects or obstacles like fences, buildings and dense trees & bushes - which can sometimes result in your dog receiving incorrect warnings. The Wireless Invisible Dog Fence has a powerful internal microprocessor that can detect GPS positioning signals without interference. There is also absolutely no need for a Sim Card, mobile phone app or subscription services. Simply turn on the collar, detect the GPS signal and set the boundary. How does it work? Setting up the collar and boundary is easy! Find a central point for your area and choose the radius of the boundary limit (the minimum radius is approx 30m and the maximum distance is approx 900m). Install boundary flags a safe distance from the boundary limit. This is where you want the system to warn your dog about progressing further. Spend time training your dog to recognise the boundary flags and teach them what to do when they hear the warning. Who is this the Wireless GPS Containment Fence for? The Wireless GPS Dog Fence is perfect for working dogs or those who want to set backyard limits on where your pup goes on your property. This GPS Dog Fence is ideal for dogs weighing 9kg - 50kgs and has a neck circumference of 25cm - 60cm. Modes The Wireless GPS Dog Fence features multi-functional modes (Sound, Vibration and Static Shock). With the ability to adjust from levels 1 - 6. Features: GPS Pin Point, Precision Positioning. 30m - 900m Range Coverage Fully Wireless and Invisible Dog Fence Water Resistant - IPX7 Large Battery Capacity - 1500MaH rechargeable Li-ion No APP is required. No Subscription is needed. No SIM card is required.