There is double-sided tape on the back of the thermometer, which can be pasted directly on the wall for easyinstallation Physical sensing principle, no battery, easyto use environmental, noteasy to damage Color printing, clear scale Small and, portable Dialdisplay, easyto observe temperature and humidity changes A thermometer measures both temperature and humidity Temperature range: 60-120℉ / 16-49℃ Humidity range: 0-100, Manufacturer: Xjdzineq