The MINI PCIe WCH384 4S Multi-IO card, equipped with a PCIe interface, is designed to be utilized in the MINI PCIe slot of your computer. Featuring an onboard WCH master control chip, it seamlessly integrates with our serial or parallel cards, extending the capabilities of your computer's serial or parallel ports. This allows for connections to various devices such as serial port networks, serial keyboards, RS485 communication tools, and facilitates parallel/printer port expansion. Furthermore, it supports the connection of other serial or parallel interface devices.