1.Integrated back stand for desktop use hanging hole for wall mounting 2.Use one 1.5 volt.AAA battery 3.Switch select degree centigrade/ Fahrenheit 4.MAX button:display MAX temperature and humidity memory 5.MIN button:display MIN temperature and humidity memory 6.RESET button:clear temperature and humidity memory 7.In MAX/MIN,after a faw seconds will auto return to normal A MODEL with 1.5 meter temperature sensor probe Product nameIndoor thermometer with hygrmometer Model numberTA138A Temperature rangeindoor:-40℃~70℃(-40℉~158℉) Accuracy±1℃ Humidity range10%-98% HR Humidity accuracy±5 HR LCD viewing Size76*65mm PowerUse 1.5 volt AAA Battery(no include) Packing Indoor thermometer with hygrmometer1PCS Packing case1PCS English user manul1PCS Product size117*60*18mm Product weight68.7g Packing size145*91*29mm Packing weight89.3g