Owner`s manual

Page 22
MRX-20 ADVANCED NETWORK SYSTEM CONTROLLER
General
The General settings screen allows for setting the Date, Time and
Temperature scale (Fahrenheit/Celsius). To view the rest of the
General settings menu, be sure to move the remote up or down or
press the arrow with the TRG-100/200 remote.
Using the arrow found at the left and right sides of each property
(hour, minutes, month, etc.) adjusts the value up, or down, respectively.
Selecting OK will accept any changes made and return to the Main
menu, as well as selecting Exit will return the user to the Main
menu, without incorporating any changes.