How to manually find the MAC address - C100AC/C100/C240
You will need your ADMIN Card
Press the MENU button then swipe the ADMIN card to access the clock menus
Scroll down until you see SYS INFO and press OK
Scroll down and select DEV INFO and press OK
Scroll down and select VIEW MAC and press OK
In this screen you will see the MAC address for this device
Press ESC key a few times to exit out of the menus.