* Monitor with real time data logger, save the measuring data along the time information ( year, month, date, hou, minute, second ) into the SD memory card and can be down load to the Excel, extra software is no need. user can make the further data or graphic analysis by themselves. * Show Humidity, Temperature and Barometer value in the same LCD. * 0.1 %RH resolution for the humidity reading, 0.1 degree resolution for the Temp. reading. * Used the precision capacitance type humidity sensor, professional and high accuracy for humidity measurement. * Professional barometer, unit : hPa, mmHg, inHg. * SD card capacity : 1 GB to 16 GB. * Large LCD display, easy readout. * Microcomputer circuit, high reliability. * The circuit design are deigned to consider low power consumption and long battery life when use battery power