The logger is small, easy to configure, can collect > 1 month data and easy to download to the PC using USB interface. This data logger is much better than the common temp and humidity recorder which can only record the max and min reading, but do not know what time and trend of the temp and humidity. With this, you can know excatly when the temp or humidity out of control.
Below is the chart on that afternoon before renovation started. The room temp is around 31degC and humidity around 68%. Will collect again after renovation completed