--- product_id: 4596906 title: "Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length)" brand: "gearmo" price: "AR$167257" currency: ARS in_stock: true reviews_count: 9 category: "Gearmo" url: https://www.desertcart.com.ar/products/4596906-gearmo-4-port-usb-to-rs232-serial-adapter-with-ftdi store_origin: AR region: Argentina --- # ±15kV ESD & surge protection Plug-and-play, no config 4 RS232 ports from 1 USB Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) **Brand:** gearmo **Price:** AR$167257 **Availability:** ✅ In Stock ## Summary > ⚡ Future-Proof Your Legacy Connections with Gearmo’s 4-Port USB RS232 Adapter! ## Quick Answers - **What is this?** Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) by gearmo - **How much does it cost?** AR$167257 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/4596906-gearmo-4-port-usb-to-rs232-serial-adapter-with-ftdi) ## 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 - • **Quad-Port Powerhouse:** Connect 4 legacy serial devices via a single USB port—streamline your workspace effortlessly. - • **Plug & Play Simplicity:** Zero setup headaches with automatic flow control and universal OS compatibility—just plug in and go. - • **Industrial-Grade Durability:** Shielded cable, screw-lock DB9 connectors, and wide temperature tolerance keep your connections rock solid. - • **Real-Time Status Monitoring:** Built-in TX/RX and power LEDs keep you informed, while robust ESD protection safeguards your gear. - • **Lightning-Fast Data Transfer:** Supports blazing speeds up to 921,600 bps with full 9-wire handshaking for flawless communication. ## Overview The Gearmo 4 Port USB to RS232 Serial Adapter leverages a reliable FTDI chipset to connect up to four DB9 serial devices through a single USB port. Compatible with Windows, macOS, and Linux, it offers plug-and-play convenience without configuration. Industrial-grade shielding, screw-lock connectors, and ±15kV ESD protection ensure stable, secure connections in demanding environments. Supporting data rates up to 921,600 bps and featuring real-time status LEDs, this adapter is the ultimate solution for integrating legacy serial equipment with modern systems. ## Description desertcart.com: Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) : Electronics Review: Works as designed on Windows 7 - This USB to serial port adapter has 4 separate serial cables that connect to a single USB 2.0 plug. Each of the 4 serial cable ends is slightly more than 3 feet long. The USB cable end is one foot long. Total end-to-end length is a little bit more than 4 feet long. Each serial cable is labeled "1", "2", "3", or "4" which makes it easy to track your connections. The connections always retain the same com port, so you won't need to reconfigure you software after restarting you computer. The adapter has 3 separate LEDs: red = power, green = TX, yellow = RX. The adapter comes with a CD-ROM that contains USB 1.1 and USB 2.0 drivers for many operating systems including Linux, Mac, Windows, and more. The release notes on the CD-ROM mention that newer drivers can be found at [...] No paper instruction manual is included which might cause inexperienced computer users to have moderate difficulty with the setup. Experienced users will find the setup straight forward and simple. Installation on Windows 7 was easy for me. I found the appropriate installer on the CD-ROM. I had to right-click the installer and select run-as-administrator. The first time I plugged the adapter in it took several minutes for the device to be detected, so be patient. Subsequent detections are fast. All 4 serial adapters can be used simultaneously. Overall I am satisfied with the quality of this device. Review: Reliable Connection for Legacy Devices - I needed to connect multiple RS232 devices to my laptop, and this adapter works well. The drivers installed quickly, and data transfer is stable. It does get a bit warm after long sessions, but overall, it’s a solid and dependable solution for older equipment. Very good value for the money, very stable conenction, windows preserves COM port numbers when you change the USB port (Persistent COM ports), the cable lenght is short but you can use an extension. Very easy to use. ## Features - 4 RS232 PORTS FROM ONE USB: Connect up to four DB9 serial devices to a single USB port. Ideal for POS systems, PLCs, CNC machines, lab equipment, barcode scanners, digital signage, and other RS232 devices. - PLUG-AND-PLAY WITH NO CONFIGURATION: Designed for simple, reliable setup with automatic transmit/receive switching and built-in hardware flow control. Works seamlessly with Windows, macOS, and Linux using stable FTDI USB drivers. No external power required. - HIGH-SPEED, FULL-COMPATIBILITY SERIAL: Supports data rates from 300 to 921,600 bps with automatic baud rate detection and full 9-wire signaling (RTS/CTS, DTR/DSR, RI) for proper handshaking and reliable connections. - BUILT-IN STATUS LEDs: This RS232 adapter includes TX/RX and power LEDs provide real-time status monitoring. Integrated +/-15kV ESD and surge protection help safeguard equipment in demanding electrical environments. - SHIELDED, INDUSTRIAL-GRADE DESIGN: Shielded RS232 to USB cable with a ferrite ring and DB9 screw-lock connectors ensures stable, noise-resistant connections. Industrial temperature rated -40C to 85C and 5–95% humidity for factory floors, control cabinets, and field installations. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004ETDC8K | | Best Sellers Rank | #137 in Serial Adapters | | Brand | Gearmo | | Color | Black | | Compatible Devices | Devices with DB9 female serial connectors such as printers, scanners, modems, CNC machines, PLCs, and other legacy serial equipment Compatible Devices Devices with DB9 female serial connectors such as printers, scanners, modems, CNC machines, PLCs, and other legacy serial equipment See more | | Connector Type | DB9 Male w/ Screws, USB Type A | | Customer Reviews | 4.6 out of 5 stars 223 Reviews | | Global Trade Identification Number | 00729440626044 | | Input Voltage | 5 volts | | Item Dimensions | 36 x 1.5 x 0.5 inches | | Item Weight | 6.24 ounces | | Item dimensions L x W x H | 36 x 1.5 x 0.5 inches | | Manufacturer | Gearmo | | Mfr Part Number | USA-FTDI4X | | Model Number | USA-FTDI4X | | Number of Items | 1 | | Number of Ports | 4 | | Package Quantity | 1 | | Power Plug Type | No Plug | | Specific Uses For Product | Connecting legacy serial devices to modern USB host systems | | UPC | 729440626044 | | Unit Count | 1 Count | | Warranty Description | 1 Year | | Warranty Type | Limited 1 year warranty | ## Product Details - **Color:** Black - **Connector Type:** DB9 Male w/ Screws, USB Type A - **Item dimensions L x W x H:** 36 x 1.5 x 0.5 inches - **Specific Uses For Product:** Connecting legacy serial devices to modern USB host systems ## Images ![Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) - Image 1](https://m.media-amazon.com/images/I/61OXOrbOJrL.jpg) ![Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) - Image 2](https://m.media-amazon.com/images/I/71oaFIqN7+L.jpg) ![Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) - Image 3](https://m.media-amazon.com/images/I/61uiEaVcKSL.jpg) ![Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) - Image 4](https://m.media-amazon.com/images/I/71GhAg70-lL.jpg) ![Gearmo 4 Port USB to RS232 Serial Adapter with FTDI Chipset – Supports Windows 11, 10, 8, 7, Linux & Mac, Features Plug-and-Play Without Configuration, ESD & Surge Protection (5ft Length) - Image 5](https://m.media-amazon.com/images/I/610Qgb-7Y3L.jpg) ## Available Options This product comes in different **Connector Type** options. ## 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as designed on Windows 7 *by H***Y on August 7, 2012* This USB to serial port adapter has 4 separate serial cables that connect to a single USB 2.0 plug. Each of the 4 serial cable ends is slightly more than 3 feet long. The USB cable end is one foot long. Total end-to-end length is a little bit more than 4 feet long. Each serial cable is labeled "1", "2", "3", or "4" which makes it easy to track your connections. The connections always retain the same com port, so you won't need to reconfigure you software after restarting you computer. The adapter has 3 separate LEDs: red = power, green = TX, yellow = RX. The adapter comes with a CD-ROM that contains USB 1.1 and USB 2.0 drivers for many operating systems including Linux, Mac, Windows, and more. The release notes on the CD-ROM mention that newer drivers can be found at [...] No paper instruction manual is included which might cause inexperienced computer users to have moderate difficulty with the setup. Experienced users will find the setup straight forward and simple. Installation on Windows 7 was easy for me. I found the appropriate installer on the CD-ROM. I had to right-click the installer and select run-as-administrator. The first time I plugged the adapter in it took several minutes for the device to be detected, so be patient. Subsequent detections are fast. All 4 serial adapters can be used simultaneously. Overall I am satisfied with the quality of this device. ### ⭐⭐⭐⭐⭐ Reliable Connection for Legacy Devices *by S***E on August 27, 2025* I needed to connect multiple RS232 devices to my laptop, and this adapter works well. The drivers installed quickly, and data transfer is stable. It does get a bit warm after long sessions, but overall, it’s a solid and dependable solution for older equipment. Very good value for the money, very stable conenction, windows preserves COM port numbers when you change the USB port (Persistent COM ports), the cable lenght is short but you can use an extension. Very easy to use. ### ⭐⭐⭐⭐⭐ Great product!!!! *by M***I on September 22, 2023* I recently purchased two Gearmo 4 Port USB to Serial RS232 Adapters to set up a console server for managing my Cisco network lab, and I must say, I'm absolutely thrilled with their performance! These adapters are connected to a single Raspberry Pi 4, and the setup was a breeze. The installation process was straightforward, and I encountered no issues getting them up and running. What impresses me the most is the seamless integration and ease of use. The adapters are highly reliable, providing consistent and fast data transfers, which is crucial when managing a network lab. I've experienced zero lag or connectivity issues, making my lab management tasks significantly more efficient. The build quality is excellent, and the adapters are compact enough not to clutter my workspace. They've proven to be an invaluable addition to my setup, and I couldn't be happier with how well they've met my needs. If you're in the market for a reliable and high-performing USB to Serial adapter, look no further than the Gearmo 4 Port model. It's a game-changer! ## 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.ar/products/4596906-gearmo-4-port-usb-to-rs232-serial-adapter-with-ftdi](https://www.desertcart.com.ar/products/4596906-gearmo-4-port-usb-to-rs232-serial-adapter-with-ftdi) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-11-04*