USB to RS232 Serial Port Adapter speed USB to serial port adapter with a 12M singlechip crystal USB port for fast data transfer. Compatible and reliable: works with USB 1.1 and USB 2.0 devices; builtin 128byte TX and 512byte RX caches with automatic handshake. Wide device support: supports Windows 95/98/98SE/ME/2000/XP/Vista/7 (32bit and 64bit) for full speed transmission across diverse devices. Convenient data transfer: uses standard USB data transfer protocol for easier and more efficient communication. Use scenarios Connect legacy serial peripherals such as modems, serial printers, barcode scanners, or POS devices that rely on RS232. Interface with industrial equipment and test instruments, including PLCs, CNC controllers, and measurement devices. Facilitate development and testing with microcontrollers or serial development boards requiring USBtoRS232 communication.