| Blue | Blue LED Displays |
| CW | Ceiling/Wall Mount Bracket |
| DC | DC Operation: Requires the unit to be powered from a DC source exclusively, typically +12 to +35 VDC. |
| Green | Green LED Displays |
| NTP-C | NTP Client: NTP Client Displays synchronize exclusively with an NTP server (replaces all standard inputs). |
| UL | "UL" Approved Power Supply: The unit is supplied with a UL/CSA approved wall mount power supply. |