What can I say? It does its job as a USB to Serial adapter. Letting me do the serial things I need to do talking to my Linux and Windows machines and embedded server (Combined with a simple NULL modem adapter). Windows 10 was a little weird, I had to jump around a bit but managed to get a driver from Prolific Technology's website as Windows built in driver didn't seem to like it very much. Linux however worked straight out of the box, Arch Linux to be more specific.

For anyone interested in exactly what type of chip this uses. For my one I have a Prolific PL-2303 RA chipset (Which was checked with Prolifics Check Chip program). Which is no...view more What can I say? It does its job as a USB to Serial adapter. Letting me do the serial things I need to do talking to my Linux and Windows machines and embedded server (Combined with a simple NULL modem adapter). Windows 10 was a little weird, I had to jump around a bit but managed to get a driver from Prolific Technology's website as Windows built in driver didn't seem to like it very much. Linux however worked straight out of the box, Arch Linux to be more specific.

For anyone interested in exactly what type of chip this uses. For my one I have a Prolific PL-2303 RA chipset (Which was checked with Prolifics Check Chip program). Which is now EOL since 2020 but still compatible with Prolifics latest drivers luckily.

The only con I can think off that wouldn't apply to most people is the lack of LEDs (As far as I can tell) indicating any sort of activity. So its a bit hard to diagnose issues without an extra inline diagnostics adapter.

Overall though very happy, Will definitely get a few of these if I ever need more in the future.

Works well. Very handy just in case the computer has no RS232 terminal. Works well. Very handy just in case the computer has no RS232 terminal.

As far as cables go... this is spectacular.... doesn't get any better than this... both ends slide effortlessly into position, sturdy cable.. works too!!!! Friendly service as always. Highly recommend As far as cables go... this is spectacular.... doesn't get any better than this... both ends slide effortlessly into position, sturdy cable.. works too!!!! Friendly service as always. Highly recommend

By: SteveP978 31/03/22

Verified Owner

Don't ask me why, but I needed to use this driver (PL2303 Prolific Windows v1.20.0 Driver)

Neither the newest Prolific (4.0.1), nor the Unitek driver worked for me. Don't ask me why, but I needed to use this driver (PL2303 Prolific Windows v1.20.0 Driver)

Neither the newest Prolific (4.0.1), nor the Unitek driver worked for me.

Contrary to the instructions on the box the manufacturer website https://www.unitek-products.com/ does not offer any drivers for this device. Later Windows finds drivers automatically but not XP, drivers are very elusive. Eventually found wd_pl2303_v1.5.0.0 from here:
https://www.driverguide.com/driver/detail.php?driverid=352548
Uses PL2303 converter so likely the driver installs from here will also work:
http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41
https://embeddedarea.com/the-famous-old-driver-of-pl2303-usb/ Contrary to the instructions on the box the manufacturer website https://www.unitek-products.com/ does not offer any drivers for this device. Later Windows finds drivers automatically but not XP, drivers are very elusive. Eventually found wd_pl2303_v1.5.0.0 from here:
https://www.driverguide.com/driver/detail.php?driverid=352548
Uses PL2303 converter so likely the driver installs from here will also work:
http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41
https://embeddedarea.com/the-famous-old-driver-of-pl2303-usb/

I bought two of these recently and are not compatible with Windows 11.
The two I bought use and end of life chip that is not compatible with Windows 11 - PL-2303RA I bought two of these recently and are not compatible with Windows 11.
The two I bought use and end of life chip that is not compatible with Windows 11 - PL-2303RA

A great wee product that just keeps on performing with no bother. A great wee product that just keeps on performing with no bother.

Does exactly what is required. Excellent for legacy support. Does exactly what is required. Excellent for legacy support.

Tried it out of the box but no luck. However it worked very well once you download the right drivers (Prolific Driver). But it was easy to download and run the driver so not too much of a problem. Tried it out of the box but no luck. However it worked very well once you download the right drivers (Prolific Driver). But it was easy to download and run the driver so not too much of a problem.

We have gone through about 40 of these all have been ok We have gone through about 40 of these all have been ok

Inexpensive, seems to be well-made, worked right out of the box (with an old RS232 device that had a reputation for being tricky). Inexpensive, seems to be well-made, worked right out of the box (with an old RS232 device that had a reputation for being tricky).

Easy to use after you download the right drivers (Prolific Driver). Google it. The cable is made well! Good quality. Recommend purchasing Easy to use after you download the right drivers (Prolific Driver). Google it. The cable is made well! Good quality. Recommend purchasing