Remington Safe Zone Dog Fence System with Collar separate warning and correction zones can be set from 1-1/2 feet to 9 feet to accommodate any size dog and any type of temperament. The advanced technology system will give your pet a progressive warning tone "chirp" that alerts it to the boundary. The system includes an easy-to-use LCD push button transmitter for quick installation and set-up. Collar adjusts to fit necks up to 26 inches and the receiver is waterproof