Blue	Blue LED Displays
C	Crystal Time Base: A crystal reference is employed for those applications requiring independence from the line frequency. A trimming function is included for greater accuracy (2-3 seconds/week).
Clear	Clear Anodized Front Panel
ESE	ESE Time Code Output: An ESE Time Code output is provided allowing the unit to drive ESE Time Code Slaves.
Green	Green LED Displays
J	220 VAC/50 Hz Operation: The unit is configured to operate from 220 VAC line voltage. 117 VAC 50/60 Hz is standard.
N	Reverse Count at Zero: Changes count direction from Down to Up at Zero.
P	19" Front Panel (Rack Mount), this unit will be 2RU.
Red	Red LED Displays
T	Tenths of Seconds: Tenths of Seconds LED Display added. Available only if option 'P' or option 'Wall' is specified.
UL	"UL" Approved Power Supply: The unit is supplied with a UL/CSA approved wall mount power supply.
W	3-Wire Power Cord: Recommended where static charges can occur. Standard on many units, otherwise a 2-wire cord is supplied.
Wall	Wall Mount Enclosure: Black powder-coated wall mount enclosure. Wall mount enclosure replaces standard housing.
Y	Relay Closure at Zero: Reed Relay for Control Applications (10W max load; 500ma switching current).
Z	Stop with reed relay closure at Zero (10W max load; 500ma switching current).