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Black rectangular USB-C to dual DB9 serial adapter with per-port RX TX LED matrix

GearMo

GearMo GM-FTDI2XC-LED 2 Port USB-C to Serial Converter

SKU CH-CWTR-2AP3C

Adds two DB9 serial ports via USB-C with per-port RX/TX LEDs and 15 KV surge protection

  • ColorBlack
  • Changer TypeUSB to DB9 (RS-232)
  • Adds two DB9 serial ports via USB-C
  • FT2232D chip enables 921.600 bps baud rates
  • Per-port RX/TX LED array shows live traffic
  • 15 kV ESD and surge protection on each port
  • Retains COM port assignments across reboots

Two serial ports over USB-C

The GearMo GM-FTDI2XC-LED adds two DB9 RS-232 ports to a laptop or desktop through a single USB Type-C female connector. It uses an FTDI FT2232D chip to present each port as a standard COM port under Windows 11 and earlier systems. The adapter draws power from the USB bus so no external supply is required. It suits engineers and technicians who need to talk to legacy industrial, networking or scientific gear.

Plug into any free USB-C port

Each DB9 male connector provides a full RS-232 interface with automatic handshake support and a 16 byte hardware buffer in each direction. The cable retains assigned COM port numbers across reboots so software configurations stay consistent. Built-in 15 KV ESD and surge protection shields the host from transients on the serial lines. The 11 cm pigtail keeps the dongle clear of adjacent ports on crowded hubs or thin ultrabooks.

LED matrix shows live traffic

A per-port RXD and TXD LED array lets you verify link activity at a glance without opening a terminal window. The FT2232D handles baud rates up to 921.600 bps with hardware flow control so sustained transfers stay reliable. Because the device is bus-powered and has no moving parts it adds negligible heat and zero acoustic noise to the system. It is not for users who need more than two serial channels or isolation between ports.

Highlights

  • Adds two DB9 serial ports via USB-C
  • FT2232D chip enables 921.600 bps baud rates
  • Per-port RX/TX LED array shows live traffic
  • 15 kV ESD and surge protection on each port
  • Retains COM port assignments across reboots

Specifications

BrandGearmo
ModelGM-FTDI2XC-LED
ColorBlack
Changer TypeUSB to DB9 (RS-232)

Questions about this item

What is the maximum baud rate the GM-FTDI2XC-LED can sustain for continuous serial communication?

The converter supports baud rates up to 921.600bps with automatic handshake and dual 16 byte hardware buffers for upstream and downstream data flow.

How much heat or noise does the adapter produce when both DB9 ports run all day?

No external power supply is needed and the unit has no fan, so it runs silently with negligible heat during sustained dual-port operation.

Which host connector must my laptop already have to use this converter?

Your device needs a standard USB Type-C female port to plug the converter's USB-C interface directly.

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