Product review (4 stars): Good Logger:
I used to use Onset's HOBO data loggers that connected to my 1998, serial connections, desktop. When I replaced the desktop with a laptop with USB connections I balked at the cost of adapting my two HOBO loggers to the new interface. So I decided to shop and came across this inexpensive, (thirty nine and some change, 2015), Inkbird, THC-4 logger. I had never heard of this company but decided to give them a try. I received the unit and installed the software which installed fairly simply.
  I have to get something off my chest; The English used in the manual is atrocious! Why is it that manufacturers from that particular country are so averse to getting language guidance from someone who speaks English? I mean, for a $50 iTunes gift card, they could get a sixteen-year-old from California to save them from embarrassing misuse of our language.
  For example: It could also be powered by USB cable when connected with PC and it could upload the data even if the battery is out of use.
What the heck?  Could?  Does it or doesnt it?
  Whereas, Ben, from Orange County, would have informed them; No Dude, what you would say is:
Data can be uploaded from the logger via the USB cable even if the battery is disconnected or dead. 
Thanks for the iTunes man.
  Anyway, I have used the logger for six months and am pleased with its performance. There was a learning curve as the HOBOs launched while still plugged into the PC, (unless you delayed them).  The Inkbird has a button on the front that you hold down for 4 seconds, then a little arrow shows on the LCD and you know it is recording. Which is nice because you can delay launch until you get to the site where you want to record temps & humidity. Setting the parameters was fairly painless and with practice I have become fairly proficient at it, (and I was born in the 1950s). I like how easy it is to export/ save the graph to Excel. You can also export it to Word, PDF, text, or email the data.
  I wanted to measure via external probe but it was unclear to me weather the logger came WITH such sensor or if I would have to buy it, (again with the communication thing).
Is it clear to anyone else from the following?

Features:
Temperature measurement Range: -30C to +60C, for optional external sensor: -40C to +85C

 Ben would have worded it:
, for optional external sensor, (included): -40C to +85C  So, for clarity, the THC-4  DOES COME WITH AN EXTERNAL PROBE,  (included).

  This little guy features upper & lower limit alarms,(auible and / or LED), for both temp and humidity. It won't act as a thermostat to turn anything on or off. I think that may be accomplished with another product form the same company called "Inkbird Itc-308 Digital Temperature Controller Outlet Thermostat"
  I purchased a second THC-4 and am able to save data to my computer and I didn't have to add or register anything on my laptop. The same software I loaded for the first THC-4 works for any subsequent unit you want to add to your fleet. When I save the data to Excel I give it a date and name. I gave to each logger a unique name, I called one Yo and the other El.
  I might have rated this product 5 stars but they didn't even think to consult Ben.
Also, when I first connect the logger, I wish the window would automatically come up, it doesnt. (I know, Im a spoiled American).

  I hope this helps,
Biff