This SPV Pulse System Control is an electronic superhear controller. This product has been specifically designed for refrigeration applications that use a Pulse Width type expansion valve. This system control includes a coil outlet temperature sensor as well as connectors for the valve and pressure sensor. The controller display features 4 LED indicators that quickly shows users information about the controller's status such as when the unit is powered, when the valve is on or off, and if the unit is connected to a mobile device.