UGREEN CM121 USB-C 8-in-1 Multifunction Adapter – Grey | 50538

Description

The UGREEN CM121 50538 8-in-1 USB-C Multifunction Adapter is a versatile multiport hub designed to expand a single USB-C connection into eight essential ports for displays, USB peripherals, wired networking, memory cards, and laptop charging.

It combines 4K HDMI output, 3 USB 3.0 ports, Gigabit Ethernet, SD and microSD/TF card readers, and USB-C Power Delivery in one compact adapter. The HDMI output supports up to 4K@30Hz, while the USB 3.0 ports provide transfer speeds up to 5Gbps.

Key Features

• 8-in-1 USB-C hub
• 1 x HDMI output
• HDMI up to 4K @ 30Hz
• Full HD 1080p @ 60Hz
• 3 x USB-A 3.0 ports
• USB data transfer up to 5Gbps
• 1 x Gigabit RJ45 Ethernet
• Network speeds up to 1000Mbps
• 1 x SD card reader
• 1 x microSD / TF card reader
• 1 x USB-C Power Delivery port
• Up to 100W PD charging support
• Integrated USB-C host cable
• Plug-and-play on supported systems
• Compact portable design
• Color: Grey
• Model: CM121
• SKU: 50538

8-in-1 Connectivity

The UGREEN CM121 combines the following connections:

• 1 × HDMI
• 3 × USB-A 3.0
• 1 × RJ45 Gigabit Ethernet
• 1 × SD Card Slot
• 1 × microSD / TF Card Slot
• 1 × USB-C PD Charging Port

This allows a compatible USB-C laptop to connect to a monitor, external storage, keyboard, mouse, Ethernet network, memory cards, and charger through one hub.

4K HDMI Output

The HDMI connection supports external monitors, TVs, and projectors.

HDMI Specifications

• Maximum Resolution: 3840 × 2160 / 4K UHD
• 4K Refresh Rate: 30Hz
• Full HD: 1080p @ 60Hz
• Audio over HDMI: Yes
• Mirror Mode: Supported
• Extended Display: Supported on compatible systems

The 50538 is a 4K@30Hz model, not a 4K@60Hz hub.

3x USB 3.0 – Up to 5Gbps

Three USB-A 3.0 ports provide additional connectivity for storage and peripherals.

USB Ports

• Number: 3
• Connector: USB-A
• Standard: USB 3.0
• Maximum Transfer Speed: 5Gbps
• USB 2.0 / 1.1 Backward Compatibility: Yes

Compatible accessories include external SSDs and HDDs, USB flash drives, keyboards, mice, controllers, printers, USB receivers, and other USB peripherals.

Gigabit Ethernet

The integrated RJ45 port provides wired network connectivity up to 1Gbps.

• Ethernet Port: RJ45
• Supported Speeds: 10 / 100 / 1000Mbps
• Maximum: 1Gbps Gigabit Ethernet

This provides an Ethernet connection for compatible thin laptops and MacBooks that do not have a built-in RJ45 port.

USB-C Power Delivery

The CM121 includes a dedicated USB-C Power Delivery input for pass-through laptop charging.

• USB-C PD: Yes
• Maximum PD Rating: Up to 100W
• Pass-Through Charging: Yes
• Compatible PD charger required: Yes

Actual charging power depends on the connected charger, host device, and power reserved for operation of the hub.

SD & microSD Card Readers

The hub includes separate slots for full-size and micro memory cards.

• SD Card: Yes
• SDHC / SDXC: Supported
• microSD / TF: Yes
• microSDHC / microSDXC: Supported
• Simultaneous SD + microSD access: Supported

This makes the CM121 useful for photographers, videographers, cameras, drones, and general file transfers.

Specifications

• Brand: UGREEN
• Model: CM121
• SKU / Part Number: 50538
• Product Type: 8-in-1 USB-C Multifunction Hub
• Host Interface: USB-C
• HDMI: 1
• Maximum HDMI Resolution: 4K@30Hz
• 1080p: Up to 60Hz
• USB-A Ports: 3 × USB 3.0
• Maximum USB Speed: 5Gbps
• Ethernet: 1 × RJ45
• Ethernet Speed: 10/100/1000Mbps
• SD Reader: Yes
• microSD / TF Reader: Yes
• USB-C PD: Yes
• Maximum PD Rating: Up to 100W
• Integrated Cable: Yes
• Cable Length: 25cm
• Dimensions: 116.5 × 46.5 × 16mm
• Color: Grey

Port Summary

Important USB-C Compatibility Note

For HDMI output, the connected laptop or other host device needs a USB-C port that supports video output, typically DisplayPort Alt Mode or compatible Thunderbolt functionality.

For charging, the host must support USB-C Power Delivery. A USB-C connector alone does not guarantee support for HDMI output or PD charging.

Best For

• MacBook Pro / MacBook Air
• USB-C Windows Laptops
• Dell XPS
• Lenovo Yoga
• HP Spectre
• ASUS ZenBook
• Chromebooks
• Office Workstations
• 4K Displays
• External SSDs & HDDs
• Gigabit Ethernet
• SD & microSD Cards
• Photographers & Content Creators
• Business Travel

Why Choose the UGREEN CM121 50538?

The UGREEN CM121 provides a useful combination of display, data, networking, card-reader, and charging functionality from a single USB-C connection. Its 4K@30Hz HDMI output, three 5Gbps USB 3.0 ports, Gigabit Ethernet, SD/microSD readers, and up to 100W USB-C PD support make it particularly suitable for expanding laptops with limited built-in connectivity.