Pressing the button on Yard Dog’s key-fob control disables and enables construction machines’ electrical system to guard against equipment theft. Yard Dog’s wirelessly controlled relay, which disconnects the battery from the starting circuit, is designed for easy installation. Because it isolates the battery from the load while the vehicle is not in use, it prevents battery drain while it stops thieves. The system is engineered by Intellitec specifically for construction vehicles and is sealed to resist the elements. Yard Dog retails for $225.