Measures and stores humidity 0 to 100rh and temperature 40c to 70c measures c or f usb interface for set up and data transfer to pc or laptop set up allows the user to select logging rate unit of measurement recording settings alarm limits and to enable disable leds logs up to 16 350 temperature and 16 350 humidity readings large 29mm lcd display for time and date changes between the date time every 10secs and current readings impact resistant abs and rubber moulded cas