Product review (5 stars): Great Little Temperature/Humidity Logger.
This is quite an amazing little device for the price. The original reason I purchased this unit was to use when making fermented sausages and salumi where temperature and humidity are critical to the process. Currently it is being used to log the temperature of a batch of beer that is fermenting in a re-purposed refrigerator. The refrigerator also has a heater inside, the cooling and heating being controlled by another InkBird device, an ITC-308.

I have an extra long usb cable attached to the TCH-4 routed to the outside so that I can download the data without removing the device from the refrigerator or opening the door. The software is very easy to use. I checked the accuracy of the sensor against a digital medical thermometer and it was within 0.5F. The software has an adjustable offset for calibration. I was so impressed that I ordered a second unit so that I can log the temperature of the refrigerator space as well when fermenting beer. Having a humidity reading for brewing beer is not necessary but an absolute must when making fermented sausages and salumi.