Description: -MULTIPLE FUNCTIONAL HUMIDITY METERS : Work as hygrometers, indoor thermometer, alarm clock, calendar, week, day, time, weather forecast, comfort icon ect. -HIGH ACCURACY AND HIGH STABILITY: You can read the temperature and humidity meter by large numbers, and know the weather condition directly. -SENSITIVE CONTROL BLACKLIGHT FUNCTIONS : Press the LIGHT key to turn the backlight on or off, or turn on the light with a clap within 1 meter, or tap the table to turn on the backlight for 5 seconds for easy night time viewing. -APPLICABLE SCENE : Digital Hygrometer Widely used at home, kitchen, bedroom, office, or car. -POWER SOURCE : Indoor thermomter clock use 2 x AAA 1.5V Battery ( not Included ),low power consumption, 12/24-hour selection; Low battery indicator. No USB cable included. Specification: Color : Black Material: Plastic Temperature range : 0~50C Temperature accuracy : +/-1C Humidity range : 10~99% Humidity accuracy : +/-5% Dimension : 3.6 x 1.5 x 3.6 inches Power : 2XAAA( not Included ) 12/24 H selection After setting year,month and day, the day of the week (Monday through Sunday)will be automatically set. And after setting the alarm clock,in any mode, press 12/24to turn on/off the alarm,when it turn on,the LCD screen appear a alarm icon.After finish setting, when alarm rings,press SNOOZE/LIGHT button to turn on the snooze.Accuracy Indoor hygrometer digital hygrometer can have a significant impact on personal comfort,health,safety and the condition of valuables in your home. How to set Time(PM), Date, Clock digital mode. Press the Mode button to select the right modeTime/Date/Alarm Hold down it for 3 seconds until the digits are flashing. Press next two buttons to adjust the digits, and then press theModebutton again to advance to the next digis in that setting. When you have finished the updated digits, click the "Mode" button again, and then set up successfully. Warm Tips: Please hold down "12/24" button for 3 seconds, the time can become PM. Package Includes: 1 Piece Temperature and Humidity Monitor 1 Piece User Manual