To determine the firmware version of a TCG 01 unit there are two methods that may be used.
Method One:
When you power up the unit, watch the front panel LCD.
The LCD will display the clock's serial number, model and current firmware version.
Method Two:
When the unit is on, press the button between the two LEDs on the front panel.
On the TCG 01, this button will require a pin to press.
