1. Indoor & outdoor temperature display, indoor humidity display
2. Temperature unit a??/a?? changeable
3. Memory of MAX/MIN value of temperature & humidity
4. 2 modes of time display: 12h / 24h
5. Clock & date display function, automatic exchanging in 5 seconds between clcock & date
7. Everyday alarm function
8. Calendar display function
10. Clock, date, lunar calendar, Gregorian calendar automatic exchanging function (only for typical models)
11. Install a outdoor temperature sensor, automatically displays indoor & outdoor temperature alternately in 5 seconds (only for typical models)
12. Power supply: 1.5V AAA x 1(not included)
