Detailed Description  Features:  Date/time/second display function, 12/24 hour can be changed  Alarm clock function  Comfort display  / display can be switched   Temperature meausuring range: -20~50  Range of humidity: 10%RH~95%RH  Resolving power: 0.1  Accuracy: +/-1.0  The test period of temperature or humidity is held on the screen for 20 seconds  Used in doors Size: (L)103*(W)28*(H)119mm Power:1.5V It can be applied to many areas, such as housing, blood bank, agricultural research, meteorological observation, environmental protection, industry, lab and refrigerated food transportation and so on.