The UGREEN 20222 is a 2m USB 2.0 Type-A to DB9 RS-232 serial adapter cable designed to connect modern computers to compatible equipment that still uses a traditional 9-pin serial interface. It converts USB communication into RS-232 serial signals through an integrated converter chipset and provides a male DB9 connector for compatible serial devices. The adapter supports configurable serial communication parameters for equipment such as industrial controllers, networking hardware, POS systems, barcode equipment and other legacy RS-232 devices. Unlike a passive cable, the 20222 performs active USB-to-serial conversion and requires a compatible USB serial driver on the host computer.
Shipping and Returns
We offer fast and reliable shipping for all our items. Orders are processed within 1-2 business days and shipped via standard delivery, which typically takes 3-5 business days.
For any questions regarding your order, please contact our customer service team for assistance.
Refund & Replacement Policy
Returns are only accepted in rare cases with double shipping charges, and only if the product is sealed.
Opened or preference-based returns are not allowed.
Please report any damaged, defective, dead-on-arrival, or incorrect product within 72 hours with an uncut unboxing video for replacement.
Refunds are processed after verification, and if a replacement is unavailable, a full refund will be issued.
Refunds are processed after verification, and if a replacement is unavailable, a full refund will be issued.