Mini Digital Clock Electronics Temperature and Humidity Portable Desktop Clock Thermometer Hygrometer 12/24H Battery Powered Function 1. The temperature, humidity, and time are displayed the same screen   2.12/24H switch   3. Fahrenheit/Celsius switch   4. Can be hung the wall and placed the table   There are brackets and holes the back   Button Setting:   S: Long press to enter the time setting, then short press to switch to set the hour and minute   UP: Normal time display status, short press to switch between Fahrenheit/Celsius. In the setting state, to increase the adjustment object, long press for rapid increase.   DOWN: Normal time display status, short press is 12/24 hours switch. In the setting state, to reduce the adjustment object, long press to reduce quickly. Time setting: In the normal display state, long press S to enter the time setting. At this time, the hour number is displayed. Use the UP or DOWN button to adjust to the required hour, and then short press the S button to switch the setting minutes, the hour and minute numbers are flashing , Use the UP or DOWN key to adjust to the required minute. Then short press the S key to exit the setting interface. Product Show Size:9.6*5.8*1cmHumidity range: 10%-99%Temperature range: -10℃(14℉)--90℃(194℉)