Magnet controllers cover a wide range of types and sizes, from a simple toggle switch to a complex system with components such as relays, timers and switches. The functions of this controller include sequence control, reversing, changing speed, jogging and plugging. They provide the control for auxiliary equipment such as brakes, clutches, solenoids, heaters and signals. The term motor starter is often used and means practically the same thing as a controller. The motor starter is the simplest form of controller and is capable of starting and stopping the motor and providing it with overload protection. This is used to control a single motor or a group of motors. There are different types of motor controllers, which include plug-and-receptacle, manual motor starting switches and integral horsepower manual starters.