The TU-S9 USB to Serial converter allows you to connect a RS-232 serial device such as a modem to a USB port on your Desktop or Laptop PC.

REVIEWS:
1) Good Product: A good product. Easily detected and installed on a WinTel platform.
I would have like it to be a bit more robust and steady hardware wise since the cable to the adapter head does not seem to be firmly connected
2) Works with eTrex: Used this to connect my Garmin eTrex with serial adapter to my USB only laptop. Installed with no difficulty and works as it should.
3) Performs as it should: Connected 4 of these to the same computer to run DNS. Till now works 24/7 for a couple of monts without any problem neither resouce conflicts (other SYBA hardware gave me tons of problems). Didn"t have even to install the driver. WinXP recognized it as "Prolific USB-to-Serial Comm Port (COM3)" to (COM6). Recomended product.