Your pet can roam the yard at all hours safely and securely thanks to the 24/7 protection provided by this Rechargeable In-ground Pet Fencing System. This system features a battery-powered backup system for around-the-clock coverage plus adjustable training levels to fit your dog’s unique temperament. Includes a rechargeable, waterproof micro line collar with recharge reminder and reflective collar safety strap for night use. Easy to install (do-it-yourself) system and can be expanded to cover up to 25 acres using a boundary kit (sold separately). Features: Transmitter with battery back-up and wire break alarms Easy to Install Training DVD Adjustable levels for various dog temperaments Microline Waterproof rechargeable collar with recharge reminder