UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter

Product Description

Network bottlenecks slow? UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter

Slow wired speeds disrupt workflows, transfers, and backups. UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter targets that pain directly. It delivers multi-gig Ethernet through a compact USB-C design built for modern laptops and desktops.

This adapter sits in the Computer Accessories category under Converter and Splitters. It fits users who demand stable, high-bandwidth wired networking without bulky PCIe cards.

UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter overview

This adapter converts a USB-C port into a 5GbE Ethernet connection. It relies on the Realtek RTL8157 controller. That chipset supports advanced power features and wide OS coverage.

The aluminum alloy housing adds durability and thermal control. The weight stays around 82 grams. Portability remains a clear advantage for mobile professionals.

Core focus areas

• High wired bandwidth for demanding workloads
• Broad backward compatibility with existing networks
• Stable performance across major operating systems

Key specifications and real-world performance

The UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter supports 5 Gbps maximum LAN speed. This equals 5000 Mbps on compatible networks and hosts.

The USB-C male connector requires USB 3.2 Gen 2 or Thunderbolt 3/4 for full throughput. Slower ports still function, yet cap the speed.

The RJ-45 Ethernet output remains backward compatible. It negotiates automatically with:

• 2.5GbE
• 1GbE
• 100Mbps

That flexibility supports mixed network environments found in offices and homes.

Realtek RTL8157 chipset advantages

The Realtek RTL8157 controller drives the adapter’s behavior. It supports advanced networking standards used in professional environments.

Supported technologies

• ACPI for system-level power control
• LPM power management during idle states
• EEE (IEEE 802.3az) for reduced energy usage
• Wake-on-LAN for remote system access
• Auto MDI/MDIX for cable type detection

These features help maintain stability during long uptime periods.

Aluminum housing and thermal behavior

Heat affects sustained data rates. The aluminum alloy enclosure plays a practical role here. It spreads heat away from the controller under heavy loads.

This passive thermal design suits fanless laptops. It also reduces throttling risks during continuous transfers, backups, or server access.

The solid housing also improves physical durability during travel.

Compatibility with operating systems and devices

The UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter supports:

• Windows 11
• macOS 15 and above
• Linux kernel 5.17+

This coverage makes it suitable for developers, IT teams, and creative professionals.

Typical compatible devices

• USB-C laptops with USB 3.2 Gen 2
• Thunderbolt 3 and 4 notebooks
• Compact desktops and mini PCs

Driver support remains straightforward across supported platforms.

Use cases that benefit from 5GbE Ethernet

High-speed wired networking matters in many scenarios.

Common use cases

• Large file transfers on local networks
• Network-attached storage access
• Virtual machine downloads
• High-resolution media workflows
• Office environments with multi-gig switches

Compared to standard 1GbE adapters, this model reduces transfer time noticeably on capable infrastructure.

Power behavior and efficiency features

The adapter supports energy-aware Ethernet features. EEE and LPM reduce power draw during low activity periods.

Wake-on-LAN allows remote system activation through the network. That suits managed IT setups and home servers.

These capabilities align with modern power expectations without compromising throughput.

Reliability and warranty coverage

UGREEN provides a 01-Year Brand Warranty with this adapter. That coverage adds confidence for professional and business use.

The aluminum housing, proven Realtek controller, and stable driver support reinforce long-term reliability.

Users in Bangladesh benefit from local warranty handling through authorized channels.

Why choose UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter

This adapter fits users who need more than basic Gigabit Ethernet. It targets speed, stability, and compatibility.

Key reasons

• 5GbE bandwidth over USB-C
• Backward compatibility with older networks
• Solid thermal design for sustained loads
• Broad OS support for mixed environments

It integrates naturally into modern setups without complex installation.

Where to buy in Bangladesh

The UGREEN CM848 (35921) USB-C to RJ45 5GbE Adapter is available through PCB Store in Bangladesh. PCB Store focuses on genuine computer accessories with official warranty coverage.

Stock availability can vary. Checking early helps secure current pricing and warranty-backed units.