Introduction: Bridging the Old and the New

In a world dominated by USB-C, wireless standards, and digital transformation, the need for reliable serial communication still persists. From POS systems and industrial machinery to modems, CNC machines, and legacy computing equipment, RS-232 serial interfaces remain foundational in many sectors.

That’s why the UGREEN CR104 USB to RS-232 DB9 Adapter Cable continues to be one of the most essential tools in IT, engineering, and retail environments.

Offering 1.5 meters of reach, a dependable PL2303 chipset, and broad OS compatibility, this cable ensures stable communication between your modern USB-equipped laptop or PC and a wide array of RS-232 devices.

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Why RS-232 Still Matters

RS-232 isn’t obsolete. It remains a vital interface for:

• POS systems and retail hardware

• Barcode and label printers

• GPS modules and modems

• Industrial PLCs and control systems

• Scientific instruments and lab hardware

• CNC machines and 3D printers

• Telco and network equipment

• Vintage hardware and data loggers

Modern computers no longer ship with native serial ports. The UGREEN CR104 fills that gap with high performance and plug-and-play reliability.

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Built-in Prolific Chipset – Trusted Industry Standard

At the heart of the CR104 is the Prolific PL2303 chipset, renowned for its:

• Stability under continuous data transmission

• Broad driver support for multiple operating systems

• Low-latency and error-free performance

• Compliance with RS-232 voltage standards

This is not a generic converter. It’s a trusted adapter for mission-critical applications.

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Up to 1Mbps Transmission Speed

Whether you’re updating firmware on a switch or sending commands to a GPS module, transmission speed matters.

The CR104 supports data transfer rates up to 1Mbps, which is more than sufficient for most serial communication protocols, especially in:

• Barcode scanning

• POS transactions

• Serial debugging

• Terminal command interfaces

• Data logging systems

It ensures smooth and fast communication with legacy hardware.

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Durable 1.5-Meter Length – Flexible Use, Practical Reach

With 1.5 meters of cable length, you get enough flexibility to:

• Connect laptops to under-the-counter POS hardware

• Interface with wall-mounted devices without clutter

• Set up a testing station without additional extenders

• Maintain neat cable management in racks or server rooms

Whether for desktop setups or field service use, the cable offers convenient length without signal degradation.

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Universal OS Support

The CR104 works across the most popular platforms, including:

• Windows (11, 10, 8.1, 8, 7, XP, Vista)

• Linux (kernel 2.4 or later)

• macOS (including M1/M2-based systems with proper drivers)

• Compatible with virtual machines using serial pass-through

In most cases, the cable is plug-and-play, though driver installation may be necessary for advanced systems. UGREEN provides links to compatible drivers for easy deployment.

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Plug-and-Play Simplicity – Minimal Setup Required

This adapter is engineered for users of all levels. Key plug-and-play features include:

• Auto-detection of COM ports

• OS-managed device enumeration

• LED activity indicators (on some systems)

• No external power supply required

• Lightweight and portable design for IT technicians

Whether you’re a developer, engineer, or retail operator, you’ll appreciate how quickly it gets you connected and working.

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Compatibility and Use Cases

Retail & POS Systems:
Easily interface your laptop with barcode readers, receipt printers, cash drawers, and display units that still rely on serial DB9 connections.

Industrial Applications:
Maintain and configure PLCs, relay systems, CNC tools, and control boards in automation environments.

IT and Networking:
Manage switches, routers, and firewalls that utilize serial console ports—especially legacy Cisco and Juniper devices.

Scientific & Academic Labs:
Communicate with oscilloscopes, multimeters, data loggers, or other lab instruments that output serial data.

Software Developers & QA Engineers:
Use the CR104 for debugging embedded devices or simulating serial inputs/outputs in test environments.

GPS and Telco:
Configure and log data from GPS receivers or GSM modules using terminal software.

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Technical Specification Table

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UGREEN CR104 vs Generic Serial Adapters

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Customer Testimonials

“I use this to connect my laptop to an industrial CNC machine, and it works flawlessly every time.”
– Moses, Industrial Engineer – Thika

“Needed a reliable serial interface for my POS printers, and this was just perfect. No driver headaches.”
– Ruth, Retail Business Owner – Nairobi

“As a network technician, I carry this in my toolkit everywhere. Works great with routers and switches.”
– Kevin, Network Engineer – Mombasa

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Frequently Asked Questions

Q: Will this cable work with my Cisco router console port?
Yes, with an additional DB9 to RJ45 console cable. This adapter provides the USB-to-DB9 part of the chain.

Q: Does it support macOS?
Yes. UGREEN provides compatible drivers for macOS. Some setups may require additional permission settings.

Q: Is external power needed?
No. The adapter draws power directly from the USB port.

Q: Can I use this for Arduino programming?
Yes, for legacy Arduino boards that communicate over RS-232 serial protocols.

Q: What is the maximum data rate?
Up to 1Mbps—sufficient for most serial communication tasks.

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Why Buy from Phonex Technologies Kenya?

When you buy from Phonex Technologies, you get:

• Genuine UGREEN CR104 products with warranty

• Same-day delivery in Nairobi, next-day across Kenya

• Expert assistance with compatibility and setup

• Access to the latest stock, drivers, and documentation

• Fair pricing for retail, schools, businesses, and field technicians

• Support for bulk institutional or corporate purchases

We are a trusted distributor of computer accessories, cables, and adapters—serving customers across Kenya with prompt delivery and technical know-how.

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How to Buy

Product: UGREEN USB-A 2.0 to RS-232 DB9 Male Adapter Cable – CR104
Length: 1.5 meters
Warranty: 1 Year
Availability: In Stock

Order Now:

• Phone or WhatsApp: [Insert contact number]

• Email: [Insert contact email]

• Website: [Insert e-commerce link]

• Visit Us: Phonex Technologies – Nairobi Showroom

• Nationwide Delivery: Available within 24–48 hours

• Bulk Orders: Discounts available for schools and corporates

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Conclusion: The Serial Adapter You Can Trust

The UGREEN CR104 USB to RS-232 Serial Adapter Cable is a must-have tool for anyone working with legacy systems, industrial hardware, or serial-based communication equipment. Whether you’re deploying a retail POS system, maintaining a machine in a factory, or updating firmware in your lab, this cable ensures you get the job done—quickly, securely, and without frustration.

Now available at Phonex Technologies Kenya. Order today and bridge the gap between modern USB interfaces and classic serial devices.

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