The EMPTY 14 3/4 X 14 3/4 X 4.25 OUTDOOR ENC Intermatic makes it simple to convert your PE Series Digital Control into a Wireless Control System. Simply install a Panel-Mounted Transceiver (PE650) and a Hand-Held Transceiver (PE950) which allows the system to display the status of each of the three circuits as well as pool or spa water temperature, pool or spa thermostat set point, heating status and overall communication status