A standard controller is powered by integrated batteries and can perform a number of different functions depending on it its settings. The current list of functions include:
Monitor - Relays messages between other controllers and the sensorView phone app.
Gate - Single arm barrier gate controller
Master - Dual arm barrier gate that requires a slave controller
Slave - Dual arm barrier gate that requires a master controller
Repeater - Repeats messages between barrier controllers and a monitor controller to extend the distance of operation