USB Temperature, Humidity and Barometric Pressure Data Logger with LCD Display

The controller software that comes with the device is obtuse.The little manual is not much help.Not calibrated and no way to calibrate. Barometric pressure is low by about 30 mbar.Intermittently gives obviously bogus readings. Redoing data download sometimes corrects the bogus data.Reading the log file turns data logging off.“Stop Recording” button on does not mean the device is actually recording.The unit intermittently decides to hang, especially when reconnecting it. Will get error “Not found a valid device”. Must reboot the device by removing and replacing its battery which deletes all logged data.The original battery only lasted about 2 weeks.