Benfei

USB to Serial Adapter, USB to RS-232 Male (9-Pin) DB9 Serial Cable

Bottom line: The Benfei USB to Serial Adapter is a specs-and-price decision rather than a crowd-consensus one in the cables & connectors category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-08-13

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Before you buy

Check the listed dimensions, connectors and platform compatibility against your setup before ordering
Used and vintage listings vary by seller and condition — check the listing photos, description and return terms before buying

Manufacturer description

COM ports and Baud rates can be modified to desired set up. BENFEI USB to DB9 RS232 Cable. USB to DB9 cable. This is a DB9(RS232 male) cable, not a VGA cable. It's not a USB to VGA(DB15) adapter, it's a USB to RS-232(DB9) adapter.

SpecPicks Verdict

SpecPicks scored Benfei USB to Serial Adapter using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. Benfei's cables & connectors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Full Specifications

connector_a	USB Type-A
connector_b	DB9 Male

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USB to Serial Adapter, USB to RS-232 Male (9-Pin) DB9 Serial Cable is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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