100% brand new and high quality Multi-functional clock support indoor calendar weather thermometer humidity meter alarm clock functions， more convenient and useful Large LCD display， back light design convenient for usage at night Simultaneously showing indoor and outdoor temperature， indoor humidity Recording max/min temperature and humidity value automatically Operating Mode: Short press “MODE” button to check alarm clock. Double press “MODE” button to check calendar. Long press “MODE” button for 3sec to enter the time setting function， press “UP” or “DOWN” to setting the time Short press “MODE” button to check alarm clock， then long press “MODE” button for 3sec to enter alarm clock setting function， press “UP” or “DOWN” to setting the alarm clock Double press “MODE” button to check calendar， then long press “MODE” button for 3sec to enter calendar setting function， press “UP” or “DOWN” to setting the calendar Short press “UP” button to switch on/off the alarm clock Long press “UP” button to switch 12/24h time display mode Item Type: Digital Multi-Functional Clock Temperature Measurement Range: 0℃-50℃(32℉-150℉) Humidity Range: 20%-99% Resolution: 1℃ Function: Weather， Calendar， Thermometer， Humidity Meter， Alarm Clock， Back Light Display: 6.5*4.5cm/2.56*1.77in LCD Size: 13.6*8cm/5.35*3.15in (L*W) Power: 2*AAA Batteries(Not Included) Package Included: 1* Digital Multi-Functional Clock