---
product_id: 4596906
title: "4 Port USB to Serial Professional Adapter with TX/RX LED and COM Retention"
brand: "gearmo"
price: "€ 84.50"
currency: EUR
in_stock: null
url: https://www.desertcart.com.cy/products/4596906-4-port-usb-to-serial-professional-adapter-with-tx-rx
store_origin: CY
region: Cyprus
---

# 15kV ESD & surge protection Cross-platform FTDI chipset 4 USB to RS-232 ports 4 Port USB to Serial Professional Adapter with TX/RX LED and COM Retention

**Brand:** gearmo
**Price:** € 84.50
**Availability:** ❌ Out of Stock

## Summary

> 🔗 Legacy meets modern: 4 ports, zero compromises.

## Quick Answers

- **What is this?** 4 Port USB to Serial Professional Adapter with TX/RX LED and COM Retention by gearmo
- **How much does it cost?** € 84.50 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/4596906-4-port-usb-to-serial-professional-adapter-with-tx-rx)

## Best For

- gearmo enthusiasts

## Why This Product

- Trusted gearmo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Engineered in the USA with over a decade of reliability, designed to withstand industrial demands and protect your gear.
- • **Pro-Grade Protection:** Shield your devices with robust 15kV ESD and surge defense—because downtime is not an option.
- • **Quad-Port Powerhouse:** Connect up to 4 legacy serial devices simultaneously with a single USB plug—perfect for multitasking pros.
- • **Plug & Play Simplicity:** No drivers or power bricks needed—just plug in and enjoy seamless COM port retention for hassle-free workflows.
- • **Universal Compatibility:** Effortlessly integrates with Windows, Linux, and macOS, ensuring your setup stays future-proof and flexible.

## Overview

The Gearmo 4 Port USB to Serial RS232 Adapter features a high-performance FTDI chipset enabling seamless connection of multiple legacy serial devices to modern computers. With plug-and-play installation, broad OS compatibility, and robust 15kV ESD and surge protection, it’s engineered for reliability in demanding professional and industrial environments.

## Description

Introduction:3 foot quad port USB 2.0 To serial adapter ft2232d chip with power rx and tx led. This USB to serial quad rs232 port converter cable utilizing the high performance ftdi chip easily adds 4 standard serial ports to your desktop, laptop or other mobile device. Serial outputs are automatically configured as additional com ports. Compatible with most GPS and pda devices (Garmin, mallagan, palm), modems, printers, scanners, digital cameras and office equipment. This converter cable has protection against static electricity and surges up to 15kv which gives you reliable data transfers and protects the converter and your equipment from damage due to over voltages. Product details: USB plug and play allows easy installation and requires no irq, dma, or i/o port resources which means more devices can be attached to your system without the hassles of device and resource conflicts. This adapter is suitable for general office Usage as well as commercial and industrial applications. The ftdi and sipex chip powered by USB, the device does not require a power outlet. Additional specifications: USB interface: standard type a female baud rates up to 921.600Bps dual 16 byte hardware data buffer (up/down stream) no irqs, dma or required. No irq conflicts automatic handshake support cable length: 3 feet os support: windows 98, me, xp, 2000, 2003, ce, vista, windows 7, and windows 8 Linux and mac os 10.Xpackage contents:3 foot quad port USB 2.0 To serial rs-232 adapter driver disc for all operating systems.

## Features

- [ 4 Port USB to RS-232 Serial Adapter ] : 4ft Cable Length - Easily connect multiple legacy DB-9 serial devices to modern USB-equipped computers. Uses include POS systems, barcode scanners, industrial controls, and digital signage applications.
- [ Easy Installation ] : Plug-and-play USB interface with COM port retention for consistent, reliable serial connections. No external power supply required - just connect and go.
- [ Wide Compatibility ] : Built with an FT4232 FTDI Chipset that supports an automatic handshake. Works seamlessly with Windows 7, 8, 10, 11, Linux, and macOS 10.X, making it a highly versatile solution across platforms.
- [ Why Gearmo? ] : Your trusted partner based in the USA, providing advanced engineering, highly reliable and superior built products to handle the most demanding industries for over 10 years.
- [ Engineering Support ] : Need specs? Contact us for CAD files, mechanical drawings, or datasheets to support your integration or project needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Gearmo |
| Item model number | USA-FTDI4X |
| Item Weight | 6.2 ounces |
| Product Dimensions | 36 x 1.5 x 0.5 inches |
| Item Dimensions  LxWxH | 36 x 1.5 x 0.5 inches |
| Color | Black |
| Manufacturer | Gearmo |
| ASIN | B004ETDC8K |
| Is Discontinued By Manufacturer | No |
| Date First Available | December 2, 2010 |

## Product Details

- **Compatible Devices:** Devices with DB9 female serial connectors such as printers, scanners, modems, CNC machines, PLCs, and other legacy serial equipment
- **Specific Uses For Product:** Connecting legacy serial devices to modern USB host systems
- **Connector Type:** DB9 Male w/ Screws, USB Type A
- **Color:** Black
- **Item dimensions L x W x H:** 36 x 1.5 x 0.5 inches

## Images

![4 Port USB to Serial Professional Adapter with TX/RX LED and COM Retention - Image 1](https://m.media-amazon.com/images/I/61OXOrbOJrL.jpg)

## Questions & Answers

**Q: Does this product work with RS-422 signals?**
A: Nope.  RS-232 only.  Great product if you want four RS-232 ports on your computer, but won’t help you with handling RS-422.

**Q: Is there any update about Windows 10 compatibility?**
A: Works just fine on Windows 10. If your computer has internet access, just plug it in, the latest drivers are available from Windows Update and Windows 10 will find them on its own (with internet access). Otherwise, check the manufacture's site, there is an .exe installer there.

**Q: For use connecting to console ports on computers or switches or such, are gender-bending and/or null modem adapters required?**
A: The way this USB to RS232 serial adapter is being used by me is to connect it to a computer that has only USB ports and no RS232 serial ports.  The four DB9 (male) connectors of the adapter are then connected to serial devices, either directly or with a RS232 serial cable (not a crossover/null modem cable) to my devices that require a RS232 serial connection to my computer.  
In general, if the device to which this adapter is being connected requires a female DB9 connector on the attaching cable, then a gender changer would be required.  If the serial device to which the adapter is going to be connected requires a crossover/null modem serial connection, then a crossover cable/null modem adapter would be required.  The answer to this question will depend on what is required by the device to which this adapter will be connected assuming the connection to a computer USB port and adapter drivers are installed correctly.

**Q: What is the voltage on the Tx pin (pin 3)?**
A: -5.7V for logic high, +4.2V for logic low, measuring from pin 3 to pin 5.

## Frequently Bought Together

- Gearmo 4 Port USB to Serial RS232 Adapter FTDI Chipset, Supports Win 11, 10, 8, 7, Linux, Mac w/ESD and Surge Protection
- StarTech.com 10' RS232 Serial Null Modem Cable - Null modem cable - DB-9 (F) to DB-9 (F) - 10 ft (SCNM9FF)
- Gearmo USB to Serial RS-232 Adapter with LED Indicators, FTDI Chipset, Supports Windows 11/10/8.1/8/7/, Mac OS X 10.6 and Above

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.cy/products/4596906-4-port-usb-to-serial-professional-adapter-with-tx-rx](https://www.desertcart.com.cy/products/4596906-4-port-usb-to-serial-professional-adapter-with-tx-rx)

---

*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-01-23*