Hl 340 Usb Serial AdapterDownload the latest USB SERIAL CH340 driver for your computer's operating system. All downloads available on this website have been scanned by the latest anti-virus software and are guaranteed to be virus and malware-free.HL-340.zip: Description: USB-SERIAL CH34x: File Size. (32bit), Windows Vista (32bit), Windows Server 2003 (32bit), Windows XP (32bit), Windows 2000, Wi..