【⭐WIRELESS BOUNDARY 】 Creating a Dog Park and Keeping your Dogs Safely Contained in Your Yard By Simply Plugging In Transmitter and Pairing To Receiver(s) Without Digging and Burying Wires With Focuser Wireless Dog Fence System. Focuser receiver collar Supports most sizes of dog (10-110lbs, Neck: 8-21in). 【⭐Radius Up to 300m】Focuser