SETS ITSELF WITHIN 1 SEC PER YEAR, AUTO ADJUSTS TO DAYLIGHT SAVINGS TIME, DISPLAYS TIME, MONTH, DAY, DATE & INDOOR TEMPERATURE FAHRENHEIT OR CELSIUS, ADJUSTABLE ARM TO PROJECT ON WALL OR CEILING OR CAN BE TURNED OFF, TIME PROJECTS WITH FOCUS ADJUSTMENT OR ROTATION FEATURE, BACKLIGHT & SNOOZE FUNCTION, ALARM & PM INDICATORS, REQUIRES 1 AA BATTERY