I needed a USB serial adapter that I wanted to use Linux but I could never find the right driver. After several weeks of sleep I tried it on Windows, the supplied driver does not work on Windows 7 but I have finally found the Chinese vendor site. Well, it works much but 1% of the characters are received in error; with an analyzer I could check that they were correct on the RS232 link so it is the RS232 / USB conversion malfunctioning. Unfortunately I have ordered two and I'll try the second tomorrow, you never know lol