---
product_id: 48657064
title: "USB to Serial Converter"
brand: "trendnet"
price: "€ 0.09"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.at/products/48657064-usb-to-serial-converter
store_origin: AT
region: Austria
---

# Plug & Play quick install USB 1.1/2.0/3.0 compatible 3-year manufacturer warranty USB to Serial Converter

**Brand:** trendnet
**Price:** € 0.09
**Availability:** ❌ Out of Stock

## Summary

> 🔗 Bridge the old and new—connect smarter, work faster!

## Quick Answers

- **What is this?** USB to Serial Converter by trendnet
- **How much does it cost?** € 0.09 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/48657064-usb-to-serial-converter)

## Best For

- trendnet enthusiasts

## Why This Product

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

## Key Features

- • **Flexible 21-inch Cable:** Integrated cable length adapts to your workspace, making installation hassle-free.
- • **Robust RS-232 Connectivity:** Connect legacy serial devices like modems and network switches with confidence and ease.
- • **Seamless USB Compatibility:** Works flawlessly with USB 1.1, 2.0, and 3.0 ports for ultimate device flexibility.
- • **Effortless Plug & Play Setup:** Get connected instantly with universal plug-and-play—no tech headaches, just productivity.
- • **Trusted Durability & Support:** Backed by a 3-year TRENDnet warranty and a 4.5-star rating from over 3,000 pros.

## Overview

The TRENDnet USB to Serial Converter (Model TU-S9) is a compact, reliable adapter that connects RS-232 serial devices to modern USB ports. Supporting USB 1.1 through 3.0 standards and multiple operating systems, it features a flexible 21-inch cable for versatile setups. With easy plug-and-play installation and a 3-year manufacturer warranty, it’s a trusted tool for professionals bridging legacy hardware with today’s technology.

## Description

From the manufacturer USB Supports USB 1.1 and compatible with USB 2.0 and USB 3.0 ports. RS-232 Serial Connector Connect RS-232 serial devices such as modems and network switches using the widely supported USB standard found in most laptops and desktops today. Flexible Cable Integrated flexible 540 mm (21 in.) USB cable accommodates most installation scenarios.

Review: good USB to Serial cable - Have been using this Serial to USB device for a good few years now and has served me well . I think i recall once or twice having issues with the drivers over the 4 or 5 years but it was easily solved by going to the TRENDnet website and updating the drivers. no complaints and a solid product.
Review: Works like a charm! - I purchased this cable to be used as an adapter to connect to my Cisco router I use for lab work via a RJ45-to-DB9 cable since there was no port on my Dell laptop to connect to.So far so good, cable seem's to be of good quality and works like a charm!

## Features

- Connection: Connect a RS-232 serial device such as a modem to a USB port on your computer
- Quick Installation: Easy installation with Universal Plug and Play (UPnP)
- Compatibility: Supports multiple operating systems
- Ports: Supports USB 1.1 and compatible with USB 2.0 and USB 3.0 ports
- Devices: Connect RS-232 serial devices such as modems and network switches using the widely supported USB standard found in most laptops and desktops today
- Protection: 2 Years TRENDnet Manufacturer's warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0007T27H8 |
| Best Sellers Rank | 125,019 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 68 in PS/2 Adapters |
| Box Contents | USB to Serial Converter |
| Brand | TRENDnet |
| Brand Name | TRENDnet |
| Colour | white |
| Compatible Devices | Desktop |
| Compatible devices | Desktop |
| Connector Type | usb |
| Connector type | usb |
| Customer Reviews | 4.5 out of 5 stars 3,092 Reviews |
| External Testing Certification | CE, FCC |
| Global Trade Identification Number | 00710931303209 |
| Input Voltage | 5 Volts (DC) |
| Item Dimensions | 6.5 x 3.5 x 1 centimetres |
| Item Weight | 40 Grams |
| Item dimensions L x W x H | 6.5 x 3.5 x 1 centimetres |
| Manufacturer | TRENDnet |
| Manufacturer Part Number | TU-S9 |
| Model Number | TU-S9 |
| Nominal Power | 2.5 Watts |
| Number of Items | 1 |
| Number of Ports | 3 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| Product Finish Type | Matte |
| Product Warranty | 3 Year Manufacturer |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specific Uses For Product | Business |
| Specific uses for product | Business |
| UPC | 710931303209 |
| Unit Count | 1.0 count |
| Warranty Type | manufacturer's warranty |

## Product Details

- **Compatible devices:** Desktop
- **Specific uses for product:** Business
- **Connector type:** usb
- **Colour:** white
- **Item dimensions L x W x H:** 6.5 x 3.5 x 1 centimetres

## Images

![USB to Serial Converter - Image 1](https://m.media-amazon.com/images/I/51vgKmQZPJL.jpg)
![USB to Serial Converter - Image 2](https://m.media-amazon.com/images/I/61eaAA+5ftL.jpg)
![USB to Serial Converter - Image 3](https://m.media-amazon.com/images/I/61d74yD20OL.jpg)
![USB to Serial Converter - Image 4](https://m.media-amazon.com/images/I/61UWZ8PhCZL.jpg)
![USB to Serial Converter - Image 5](https://m.media-amazon.com/images/I/61QSkIYUlEL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How long is the cable and is the colour as shown (white)?**
A: Its a whit half metre cable.  Good quality converter.

## Customer Reviews

### ⭐⭐⭐⭐⭐ good USB to Serial cable
*by D***E on 19 December 2018*

Have been using this Serial to USB device for a good few years now and has served me well . I think i recall once or twice having issues with the drivers over the 4 or 5 years but it was easily solved by going to the TRENDnet website and updating the drivers. no complaints and a solid product.

### ⭐⭐⭐⭐⭐ Works like a charm!
*by G***T on 1 February 2015*

I purchased this cable to be used as an adapter to connect to my Cisco router I use for lab work via a RJ45-to-DB9 cable since there was no port on my Dell laptop to connect to.So far so good, cable seem's to be of good quality and works like a charm!

### ⭐⭐⭐⭐⭐ and you're good to go
*by A***N on 1 November 2015*

Purchased as need to configure Cisco Network devices. Confirmed working on Windows 7 - 64 bit and Ubuntu 14.04 LTS 64-bit. For windows simply install the driver from the supplied Driver CD, check which COM number is allocated. For Ubuntu you may need to do a bit of googling to find out how to setup the usb to serial. Once you find the right guides, you will see it only takes 5 mins to setup, and you're good to go. Note, I needed to use minicom software to connect to devices, you just have to supply the correct settings i.e. ttyUSB0... for it to work. The important thing is this this cable contains a chip made by Prolific Technology, which Ubuntu does officially support. I have also purchased much much cheaper cables as spares from eb*y, but they only seam to work in Windows, and the quality of the cable is not as good. My advice is buy a better quality cable, it may seam more expensive, but the benefit is they are likely to be compatible with most OS's. Highly recommended.

## Frequently Bought Together

- TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 64cm (25 in.) Cable Length, Plug & Play, White
- USB to RJ45 Console Cable 2pack, Essential Tool for Cisco, NETGEAR, Ubiquiti, LINKSYS, TP-Link Routers/Switches Connection, Compatible with Windows, Mac, Linux Laptops
- OIKWAN DB9 to RJ45 Console Cable,Compatible with Cisco Routers Switches Firewalls CAB-CONSOLE-RJ45

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---

*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-07-10*