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UGREEN CM812 4-in-1 Card Reader with USB-C & USB-A 2-in-1 interface
Key Features
Brand: UGREEN
4-in-1 Multi Card Support – Compatible with SD, TF (MicroSD), MS & CF memory cards for versatile file access
Dual USB-C & USB-A Interface – 2-in-1 connector ensures compatibility with modern and legacy devices
High-Speed Data Transfer – Fast and stable performance for photos, videos, music & documents
Plug & Play Convenience – No drivers required; easy setup on Windows, macOS & Linux
Wide Device Compatibility – Works with laptops, desktops, tablets & USB-C smartphones
Compact & Travel-Friendly Design – Lightweight and portable for office, home or travel use
Durable Build Quality – Strong casing designed for long-term daily use
1 Year Warranty
Ugreen 4-in-1 Card Reader CM812 Product Overview
The Ugreen 4-in-1 Card Reader with USB-C & USB-A 2-in-1 Interface CM812 is a professional-grade multi-slot data transfer hub engineered for high-speed media workflow management. This Ugreen versatile adapter features a dual-host connector design that bridges legacy USB-A equipment and modern USB-C hardware with flash memory cards. Encased in a rugged, heat-dissipating housing, it provides a seamless plug-and-play solution for photographers, videographers, and drone operators who need to ingest media across multiple device platforms.
Core Features and Technical Specifications
Dual-Host Connector Architecture
The defining feature of this model is its integrated 2-in-1 host interface layout. It combines a standard USB-A 3.0 male connector and a modern USB-C male connector on a single cable tail. This hybrid configuration allows the card reader to link directly to traditional desktop towers, updated ultrabooks, iPad Pro models, and USB-C equipped smartphones without the need for secondary adapters or OTG dongles
High-Speed Multi-Slot Interface
The Ugreen hub features four independent memory slots that utilize an advanced USB 3.0 data processing core. This setup supports transmission speeds up to 5Gbps, allowing large RAW image batches, uncompressed 4K video clips, and dense audio archives to migrate cleanly. The reader accommodates four primary memory standards:
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- SD Slot: Supports SDXC, SDHC, and standard SD cards.
- Micro SD (TF) Slot: Supports Micro SDXC, Micro SDHC, and Micro SD cards.
- CF Slot: Supports CompactFlash Type I cards.
- MS Slot: Supports Memory Stick and Memory Stick PRO formats.
Simultaneous Dual-Card Data Pipelines
Unlike basic card readers that only read one card slot at a time, the CM812 model supports active multi-card reading and writing capabilities. It permits users to insert and access multiple cards simultaneously (such as an SD card and a Micro SD card). This dual-pipeline architecture lets you transfer files directly between the memory cards without caching them on the host computer hard drive
Smart Integrated Controller and Protection
Built inside the sleek shell is a high-performance GL3224 processing chipset. This controller manages large packet data flows efficiently to prevent data corruption, packet drops, and thermal throttling. The internal hardware includes multi-protection systems that shield your delicate memory cards from overcurrent, overvoltage, short-circuits, and static discharge.
Key Benefits for Users
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- Multi-Device Compatibility: Connects smoothly to Type-A or Type-C host machines to optimize hardware deployment flexibility.
- Workflow Consolidation: Replaces independent standalone card readers with a single four-slot hardware assembly.
- Cross-Card Cloning: Supports direct card-to-card data migration to speed up post-production backup tasks.
- Rugged Exterior Build: Wrapped in a premium aluminum alloy enclosure that acts as a passive heatsink during sustained high-speed data transfers.
Ideal Applications and Use Cases
Professional On-Site Photography
Enables field photographers to rapidly offload high-resolution RAW photo files from DSLR or mirrorless cameras directly onto a laptop or a USB-C tablet for immediate editing.
Action Sports and Drone Content Ingestion
Perfect for drone pilots and action camera shooters who need to pull footage from Micro SD cards and back it up to a mobile device while on location.
Legacy Hardware Diagnostics
An essential tool for IT administrators and media technicians who regularly service older industrial machinery or legacy audio gear that relies on CompactFlash or Memory Stick cards.
Hybrid Workstation Extension
Allows remote workers to share an efficient data bridge between an older home office desktop tower (via USB-A) and a newer company-issued laptop (via USB-C).
Summary Profile
- Product Brand: Ugreen
- Model Identifier: CM812
- Product Part Number: UG-20224
- Host Interfaces: 1x USB-A Male and 1x USB-C Male (2-in-1 Design)
- Memory Card Slots: 1x SD, 1x Micro SD (TF), 1x CF (Type I), 1x MS
- Maximum Data Speed: Up to 5 Gbps
- Core Controller Chipset: GL3224
- Multi-Card Capability: Simultaneous Read and Write Support
- Enclosure Material: Premium Heat-Dissipating Aluminum Alloy
- System Compatibility: Windows, macOS, Linux, ChromeOS, Android, iO
