Purchase the Operation Manual for V4 Time and Temp

To enter the option menu push the SELECT and INCREASE buttons simultaneously, then release.
Once in the option menu, use the SELECT to advance through the functions and the INCREASE and DECREASE to change the data.

–Lamp Test–
0: Set Time: Hours (0-23)
1: Set Time: Minutes (0-59)
2: Set Date: Day of week (1-7) 1=Sunday
3: Set Date: Month (1-12)
4: Set Date: Day of month (1-31)
5: Set Date: Year (0-99)
6: Set Display Rate in seconds (0.5-99.5)
7: Set Temperature Offset (+/- 99°F)
8: Daylight Savings Time (on/off)
9: Dimming (Automatic, Bright, Dim)
–Display Mode–