Worked awesome for my field data collection. I really like the rugged housing. However it did not include the power adapter and it was a little difficult to find one. They don't even sell it in fact. My equipment has its on power, but the additional power was one of the reasons I when with this unit. Overall great, but they should at least sell the power cord.

No software to add. Plug and configure. Using it for Drip feed CNC.

I used this to successfully connect 8 RS-232 temperature controllers to a single USB port. I am reading at .5 second intervals and it works well. The weird thing is that the port mapping was not sequential to the port numbering on the box. It was a hit and miss thing. I had to start up polling on a single port and move the device connection to the different ports to find which one was active. And for some reason, it even skipped over to unused port numbers. So, I had ports 1 - 6 mapped to Com 8 - Com 13 and then 7 and 8 mapped to Com 15 and 16. Com 1 - 6 did not map to 8 and 13 in that order either. port 1 was connected to com 10 and some random order. I did order a second one for another system so it should show you that the mapping was not a primary concern and once I figured it out, it should never have to be redone. I unplugged and replugged several times and the port mapping remained in tack.

plug it in and it works
I needed to trim cable end width is serial cable so 4 fit side by side. simple fix
easy secure console server with RPI using ser2net package

Tried many cheap USB to RS-232 converters, what a waste of money and time trying to get them to work properly; nothing but communication errors and frustration. This one works flawlessly in Windows 7, 8.1 and 10; drivers installed automatically (no disk needed) and COM ports are persistent (never change) between multiple devices; it looks like the driver always remembers a serial number (or somehow is able to identify a specific unit) of the device and assigns it the same COM port every time this specific device is plugged in. Used 3 of those converters on the same computer without any problems whatsoever. Has an external 5V input port (I think it is a standard 2.5mm plug) but I did not need to use it; it works flawlessly getting it's power only from the USB port. The case is solid steel and comes with a DIN rail adapter as well as it can be surface mounted with screws. Love the send and receive indicator lights (for each port) since I can visually identify what is happening with either serial port. Also has a power LED. I cannot say anything about it's high speed serial performance since my application calls for only 38.4kbs and it has been running without a single error for months now. At this speed, basically saturating both ports with data traffic, it is just slightly above the ambient temperature (cannot really call it warm). As for reliability goes, I have been using approx. 15 of those converters for several months (purchased from different sources including Amazon), not a single DOA or failure. A true industrial quality USB to serial port converter that is very reasonably priced.