--- product_id: 504832174 title: "USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64" brand: "ec buying" price: "274 kr" currency: DKK in_stock: true reviews_count: 5 category: "Ec Buying" url: https://www.desertcart.dk/products/504832174-usb-to-rs232-serial-adapter-usb-rs232-converter-cable-usb store_origin: DK region: Denmark --- # No external power needed Supports full-speed 12Mbps data transfer USB to 9-pin serial conversion USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64 **Brand:** ec buying **Price:** 274 kr **Availability:** ✅ In Stock ## Summary > 🔗 Bridge the old and new—connect with confidence and speed! ## Quick Answers - **What is this?** USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64 by ec buying - **How much does it cost?** 274 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/504832174-usb-to-rs232-serial-adapter-usb-rs232-converter-cable-usb) ## Best For - ec buying enthusiasts ## Why This Product - Trusted ec buying brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Portable:** Lightweight matte finish design fits perfectly in any professional toolkit or laptop bag. - • **Robust Device Support:** Perfect for MCU programming, LED controllers, modems, and ISDN adapters. - • **Effortless Installation:** Auto driver install means you’re up and running in minutes—no IT help required. - • **Universal Compatibility:** Seamlessly supports Windows (7/8/10, 32/64-bit), Mac OS, and older USB standards. - • **Plug-and-Play Simplicity:** Transforms legacy serial devices into USB-ready tech with zero hassle. ## Overview The EC Buying HL-340 USB to RS232 Serial Adapter is a compact, plug-and-play converter cable that enables seamless communication between USB ports and traditional 9-pin serial devices. Supporting full-speed 12Mbps data transfer and broad OS compatibility including Windows 7/8/10 (32/64-bit) and Mac OS, it requires no external power or complex drivers, making it an essential tool for professionals managing legacy hardware in modern setups. ## Description ★Product features: easy installation, no external power supply, and physical drive required ★Scope of application: ♥This product can easily realize the conversion between the computer USB interface and the universal serial port, providing a fast channel for the computer without a serial port, and using this product is equivalent to turning the traditional serial port device into a plug-and-play USB device. ♥ Supporting various models of single-chip microcomputer, single-chip STC download, LED screen control card, MODEM, and ISDN terminal adapter communication is suitable for computers or notebooks with USB ports. ★Application platform: Support USB1.0/1.1 specification, compatible with USB2.0 specification, support full-speed transfer mode 12MBPS, support Win98, 98SE, Me, 2000, XP, Mac OS8.6, vista, win7-32, 64-bit. ★Installation instructions: 1. Run the driver CH340.EXE file to install 2. Connect the USB serial cable to the USB interface of the computer, and automatically install the driver 3. After the installation is successful, the COM port appears in the device manager. Review: Perfectly work. - Works perfectly with my Win-11 & Win-10 laptop without any needs for driver. Review: سيئة - سيئة للغاية ولا تتحمل السرعات المتوسطة حتي انها لم تنقل سوفت ريسيفر من لابتوب ## Features - √USB to 9-pin serial cable Product features: easy installation, no external power supply, and physical drive required - √Applicable scope: This product can easily realize the conversion between the USB interface of the computer and the universal serial port, providing a fast channel for the computer without a serial port, and using this product is equivalent to turning the traditional serial port device into a plug-and-play USB device. - √ Supports various models of MCU, MCU STC download, LED screen control card, MODEM, and ISDN terminal adapter communication is suitable for computers or notebooks with USB ports. - √Application platform: Support USB1.0/1.1 specification, compatible with USB2.0 specification, support full-speed transfer mode 12MBPS, support Win98, 98SE, Me, 2000, XP, Mac OS8.6, vista, win7-32, 64-bit. - √Installation Instructions: 1. Run the driver CH340.EXE file to install 2. Connect the USB serial cable to the USB interface of the computer, and automatically install the driver 3. After the installation is successful, the COM port appears in the device manager ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B3937767 | | Brand | EC Buying | | Color | blue | | Colour | blue | | Compatible Devices | ISDN Terminal, LED Display Controller, microcontroller | | Compatible devices | ISDN Terminal, LED Display Controller, microcontroller | | Connector Type | USB-RS232 | | Connector type | USB-RS232 | | Customer Reviews | 4.2 out of 5 stars 145 Reviews | | Finish | Matte | | Finish type | Matte | | Input Voltage | 9 Volts | | Item Weight | 0.05 Kilograms | | Manufacturer | EC Buying | | Mfr Part Number | EC Buying HL-340 USB | | Model Number | HL-340 | | Number of Items | 1 | | Number of Ports | 2 | | Package Quantity | 1 | | Power Plug Type | No Plug | | Specific Uses For Product | PC | | Specific uses for product | PC | | Unit Count | 1 Count | | Warranty Type | Limited | ## Product Details - **Brand:** EC Buying - **Colour:** blue - **Compatible devices:** ISDN Terminal, LED Display Controller, microcontroller - **Connector type:** USB-RS232 - **Specific uses for product:** PC ## Images ![USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64 - Image 1](https://m.media-amazon.com/images/I/6171mo1LHoL.jpg) ![USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64 - Image 2](https://m.media-amazon.com/images/I/71I7+Re6PvL.jpg) ![USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64 - Image 3](https://m.media-amazon.com/images/I/71OMEX1KgxL.jpg) ![USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64 - Image 4](https://m.media-amazon.com/images/I/7191JP-TfrL.jpg) ![USB to RS232 Serial Adapter, USB-RS232 Converter Cable, USB 9-Pin Serial Cable Support Windows 7/8/10/32/64 - Image 5](https://m.media-amazon.com/images/I/71QsogcEEJL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfectly work. *by S***C on 10 January 2026* Works perfectly with my Win-11 & Win-10 laptop without any needs for driver. ### ⭐ سيئة *by M***D on 12 March 2026* سيئة للغاية ولا تتحمل السرعات المتوسطة حتي انها لم تنقل سوفت ريسيفر من لابتوب ### ⭐⭐⭐⭐⭐ Is great price works well *by S***E on 26 August 2025* Worked perfectly to add a serial com port to a newer laptop. ## Frequently Bought Together - EC Buying USB 2.0 to Serial DB-9 RS232 Adapter, Windows 7/8/10/11/32/64/XP/RS232 to USB Converter - OIKWAN USB to RS232, USB Serial Adapter with FTDI Chipset,USB 2.0 to Male DB9 Serial Cable for Windows 11,10, 8, 7, Vista, XP, 2000, Linux and Mac OS(6ft)… --- ## 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.dk/products/504832174-usb-to-rs232-serial-adapter-usb-rs232-converter-cable-usb](https://www.desertcart.dk/products/504832174-usb-to-rs232-serial-adapter-usb-rs232-converter-cable-usb) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-07-29*