The CM185 (Model Number 50706) dual-slot SD card reader promises fast and convenient data transfer between your memory cards and a variety of devices. Having used it extensively with my MacBook Pro, Samsung Galaxy S23 Ultra, and even a DSLR camera, I’m ready to share my in-depth review, covering its performance, compatibility, and overall value.

This card reader boasts a sleek, grey aluminum design and includes both USB 3.0 Type-A and USB-C connectors, ensuring broad compatibility. The dual-slot design allows for simultaneous reading of both SD and microSD cards, a significant time-saver compared to single-slot readers. The compact size and included protective cap make it ideal for on-the-go use.

The plug-and-play functionality is a major plus; no driver installation is required for Windows, macOS, or Linux. Furthermore, the built-in overcurrent, overvoltage, and short-circuit protection adds an important layer of safety for your devices and data.

Transfer speeds were impressive. I consistently achieved read speeds exceeding 80MB/s for large files (10GB+) on my MacBook Pro, significantly faster than with my previous card reader. On my Samsung Galaxy S23 Ultra, while slightly slower due to the phone’s USB limitations, the transfer speeds were still noticeably faster than using the phone’s built-in card reader. The simultaneous reading of both cards also significantly reduced the time it took to backup photos and videos from my DSLR memory cards.

The aluminum housing did an adequate job of dissipating heat, even during prolonged use with high-capacity cards.

As advertised, the CM185 proved highly compatible. I successfully used it with my MacBook Pro, Dell XPS 13, Samsung Galaxy S23 Ultra, and iPhone 15 Pro Max (using an appropriate adapter). It flawlessly read a variety of SD cards, including SD, SDHC, SDXC, and microSD cards of different capacities and brands.

The seamless compatibility across various operating systems and devices is a testament to its design and functionality.

Pros

• Fast transfer speeds
• Dual-slot design for simultaneous reading
• Wide compatibility across various devices and operating systems
• Plug-and-play functionality
• Compact and portable design
• Built-in safety features

Cons

• Transfer speeds on mobile devices are limited by USB-C bandwidth.
• The protective cap could feel a little flimsy over time.

The CM185 (Model Number 50706) is a solid and reliable SD card reader that offers excellent performance and broad compatibility. The dual-slot design and fast transfer speeds make it a significant upgrade over single-slot readers. While there are minor drawbacks, the overall benefits far outweigh them. If you’re looking for a fast, versatile, and dependable SD card reader, I highly recommend the CM185.