Option Descriptions:
(1)
Battery Backup select from:Nothing(leave field blank) for no battery backup
-B20 for 20 hour battery backup
-B30 for 30 hour battery backup
(2)
Optional Celsius Operation(Fahrenheit is standard) select from:Nothing(leave field blank) for fahrenheit operation
-C for celsius operation
Note: All combinations may not be valid, check spec sheet for valid part numbers.