When the dog exceeds the specified activity range, the receiver starts the training function and reminds the dog to return to the safe zone with an audible warning and an electric shock. Features: Automatic Dog Training: When your dog tries to cross the border, the electronic fence beeps and vibrates. Wireless remote controlled electronic fence: remote control. With the transmitter as the center, the remote control has a maximum radius of 500 meters. Adjustable: The signal strength of the transmitter is adjustable from 0 to 100 levels. The receiver is waterproof, rechargeable, economical and durable. Digital Display: The transmitter adopts a digital display to visually display the current signal speed. Features: Product name: wireless dog fence Main materials: ABS and electronic materials Grade: 0-100 adjustable The maximum radius of the remote control: 500 meters European regulations Notes: * Please fix the transmitter 1.5m from the floor without a metal wall, so as not to interfere