UGREEN USB-C to HDMI + VGA Converter – White – MM123

The UGREEN MM123 is a dual-output USB-C adapter that converts a single USB-C port into both HDMI and VGA connections for external displays. This compact converter supports 4K HDMI output at 30Hz or 1080p VGA simultaneously, making it versatile for students presenting across different classroom equipment and business professionals who encounter varying projector types at client sites. The white aluminum housing matches modern laptop aesthetics while providing reliable video conversion without external power requirements.

Key Features & Benefits

• Dual Display Output Options: Features both HDMI and VGA ports on a single adapter, which means you can connect to modern 4K displays or legacy VGA projectors without carrying multiple dongles or guessing which connection type you’ll encounter at your destination.
• 4K HDMI Resolution Support: Delivers video up to 3840×2160 at 30Hz through the HDMI port, so your presentations, design work, and video content display with exceptional clarity on compatible 4K monitors and projectors, making fine details and small text easily readable.
• Mirror or Extend Display Modes: Supports both mirroring the same content to two displays simultaneously (HDMI + VGA) or extending your desktop across both screens, giving you flexibility for different presentation scenarios or multi-monitor productivity setups.
• Universal USB-C Compatibility: Works with any laptop, tablet, or smartphone featuring a USB-C port with DisplayPort Alternate Mode including MacBook Pro/Air, Dell XPS, HP Spectre, Surface devices, and Samsung Galaxy phones without requiring driver installation.
• Compact Aluminum Design: Measures just 2.95 inches long with a lightweight white aluminum housing that dissipates heat during extended use and complements the aesthetic of modern silver and white laptops while fitting easily into laptop bags.

Technical Specifications

Connector Configuration

• Input: USB-C (USB Type-C) male connector
• Output 1: HDMI (Type A) female port
• Output 2: VGA (HD-15) female port
• Cable Length: 5.9 inches (15cm) integrated cable
• Color: White aluminum housing with matching white cable

Video Performance – HDMI Port

• Maximum Resolution: 4K (3840×2160) at 30Hz
• Supported Resolutions: 2560×1440, 1920×1200, 1920×1080 (1080p), 1280×720 (720p)
• Refresh Rates: 30Hz at 4K, 60Hz at 1080p and below
• Color Depth: 24-bit True Color (16.7 million colors)
• HDMI Version: HDMI 1.4 specification

Video Performance – VGA Port

• Maximum Resolution: 1920×1200 (WUXGA) at 60Hz
• Supported Resolutions: 1920×1080, 1680×1050, 1600×1200, 1280×1024, 1024×768, 800×600
• Refresh Rate: 60Hz at all supported resolutions
• Analog Signal: Digital-to-analog conversion with built-in DAC

Dual Display Modes

• Mirror Mode: Same content on both HDMI and VGA simultaneously
• Extend Mode: Different content on each display (extended desktop)
• Single Display: Use either HDMI or VGA independently
• Maximum Combined: 4K HDMI + 1080p VGA simultaneously

Audio Specifications

• HDMI Audio: Uncompressed digital audio pass-through up to 7.1 channels
• Supported Formats: PCM, Dolby Digital, DTS
• VGA Audio: No audio support (VGA is video-only)
• Note: Use separate audio cable when connecting via VGA

Power & Conversion

• Power Source: Bus-powered via USB-C (no external adapter needed)
• Power Consumption: Less than 2.5W
• Chipset: Active conversion with integrated video processor
• DisplayPort Alt Mode: Required on USB-C source device

Physical Specifications

• Adapter Dimensions: 2.95 × 1.77 × 0.59 inches (75 × 45 × 15mm)
• Total Length: 8.86 inches (22.5cm) including cable
• Weight: 1.41 oz (40g)
• Housing Material: Aluminum alloy with anodized finish
• Port Protection: Reinforced connector housings

Compatibility Requirements

• USB-C Port Type: Must support DisplayPort Alternate Mode (DP Alt Mode)
• Operating Systems: Windows 11/10/8/7, macOS 10.12+, Chrome OS, Linux, Android 8.0+
• Compatible Devices: MacBook Pro/Air (2016+), iPad Pro, Dell XPS, HP Spectre, Lenovo ThinkPad, Surface, Samsung Galaxy S/Note series
• Note: Charging-only USB-C ports will not work

Standards & Certifications

• HDCP Support: HDCP 1.4 and 2.2 for protected content
• CE Certified: European safety compliance
• FCC Certified: Electromagnetic interference standards
• RoHS Compliant: Lead-free construction

Environmental Specifications

• Operating Temperature: 0°C to 50°C (32°F to 122°F)
• Storage Temperature: -20°C to 60°C (-4°F to 140°F)
• Humidity: 10% to 90% non-condensing

Use Cases & Applications

For Students: University students can confidently present in any classroom regardless of available equipment—use HDMI for modern smart classrooms and VGA for older lecture halls without carrying multiple adapters. Graduate students defending dissertations benefit from having both connection types available as insurance against incompatible venue equipment. Engineering and architecture students reviewing CAD drawings can extend their desktop across two displays during group critiques, showing design work on one screen while referencing specifications on another.

For Business Presentations: Sales professionals and consultants traveling to various client sites can adapt to any conference room setup without advance knowledge of display infrastructure. The white finish complements professional laptop aesthetics during high-stakes presentations where appearance matters. Corporate trainers delivering workshops can mirror content to both an HDMI projector for the audience and a VGA monitor for personal reference, maintaining eye contact while monitoring presentation flow.

For Educational Technology: Teachers and lecturers can simultaneously display content on a modern classroom projector via HDMI while routing the same signal to a legacy VGA monitor on their desk for monitoring, eliminating the need to constantly turn around during lessons. Substitute teachers arriving with their personal laptops can confidently connect to unfamiliar classroom equipment using whichever port is available.

For Remote Work & Video Conferencing: Remote professionals using laptops with limited ports can connect to two external monitors—one via HDMI for primary work and another via VGA for secondary reference materials or communication tools. The extended desktop mode increases productivity by dedicating screen space to specific tasks like email, project management tools, or system monitoring.

For Event Management: Conference coordinators managing AV setups can use the MM123 to feed presentation content to both a main HDMI projector and a VGA confidence monitor for speakers. Event photographers displaying work at venues with mixed equipment ages can connect to available displays without last-minute adapter searches.

For Healthcare & Clinical Settings: Medical professionals presenting diagnostic images or training materials in hospitals can adapt to the mixed technology environments common in healthcare, where newer examination rooms have HDMI displays while older conference rooms retain VGA projectors.

For Field Service & Technical Support: IT professionals troubleshooting display issues or configuring systems can connect to both modern and legacy monitors simultaneously, making it easier to test different display outputs or compare video quality across connection types during diagnostic procedures.

The UGREEN MM123 provides exceptional versatility for USB-C devices needing flexible display connectivity. However, verify your device’s USB-C port supports DisplayPort Alternate Mode before purchasing—some budget laptops and older Android phones have USB-C ports limited to charging and data transfer without video output capability. You can usually confirm DP Alt Mode support by checking if your device can connect to USB-C displays or if the manufacturer’s specifications mention video output through USB-C.

When using both outputs simultaneously in mirror mode, both displays show identical content at the lower of the two resolutions—for instance, connecting a 4K HDMI display and a 1080p VGA projector will result in 1080p content on both screens. For maximum quality on a single display, use only the port you need and disconnect the other. The adapter draws minimal power from your device, but extended use while on battery may reduce runtime slightly compared to disconnected operation.

The VGA port provides analog video only, so presentations including audio require a separate 3.5mm audio cable from your device to the projector or sound system. The HDMI port carries both video and audio, making it preferable when audio is required and both connection types are available. The white color suits silver and white laptops particularly well but may show dirt or discoloration over time with heavy use—the aluminum construction remains durable, though the aesthetic may require occasional cleaning.

The 5.9-inch attached cable provides positioning flexibility without excessive length that could create desk clutter. However, this fixed cable means damage to the cable requires replacing the entire adapter. Handle the cable junction carefully, especially when packing the adapter for travel. For best results with older VGA projectors, allow a few seconds after connection for the projector to detect and sync with the signal—some vintage equipment requires longer handshake periods than modern HDMI displays.