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Versatile Serial Connectivity: Adds a standard EIA RS-232 port to your GPD Pocket 4, supporting RS-232, RS-485, and RS-422 protocols for broad device compatibility. Driver-Free Installation: Plug-and-play design requires no additional drivers, enabling quick and efficient device connections. Durable Construction: Features gold-plated pure copper pins for reliable and stable communication in industrial settings. Adjustable Baud Rates: Supports data transfer rates from 110 bps to 256 kbps, accommodating various communication needs. Easy Module Swapping: Designed for seamless integration with the GPD Pocket 4's modular I/O port, allowing effortless transitions between different expansion modules.