1. Convenient Wireless Design: No need to bury wires, making installation time-saving and hassle-free. The transmitter offers 8 intensity levels, allowing you to choose the appropriate setting for your dog. 2. 4-Level Distance Adjustment: Features 4 adjustable coverage ranges with radii of 50m, 100m, 150m, and 200m from the center of the transmitter. This allows your dog freedom to play safely within a secure boundary. 3. Adjustable Collar and IP68 Waterproof Receiver: The collar adjusts from 8 to 25 inches, fitting dogs weighing between 10 and 120 pounds. The receiver is IP68 waterproof, allowing your dog to swim, bathe, or play in the rain without damage. 4. Rechargeable Collar: Both transmitter and receiver are equipped with built-in rechargeable batteries, reducing the need for frequent replacements and offering long-term, convenient use. 5. Supports Multiple Receivers: The system is compatible with multiple receiver collars, allowing you to add additional collars for use with more than one dog.