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).
J	220 VAC/50 Hz Operation: The unit is configured to operate from 220 VAC line voltage. 117 VAC 50/60 Hz is standard.
LT	Light Tower: Composed of a foot, base unit, three LEDs - Green, Yellow/Amber & Red - and a cap for for timing and controlling individuals who are engaged in Public Speaking. It is powered by an included 24V Power Supply. Must also order Option X.
N	Reverse Count at Zero: Changes count direction from Down to Up at Zero.
T	Tenths of Seconds: Tenths of Seconds LED Display added.
UL	"UL" Approved Power Supply: The unit is supplied with a UL/CSA approved wall mount power supply.
X	Three Relay Outputs: Three Relay Outputs (two are programmable, 3rd @ "00:00") (Option 'Z' is included).
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).