This 3-in-1 card reader features USB-A, USB-C, and dual card slots (SD & microSD), allowing fast file transfers from action cameras, security cameras, wildlife monitors, dash cams, and more. Simply connect to a smartphone or tablet via USB-C (OTG supported), or plug into a computer via USB-A to browse, copy, or offload photo and video files—freeing up your memory card instantly. Specifications 1. Design & Interface Type-A USB 3.0 Gen1 port (blue marker) Type-C USB 3.0 Gen1 port (supports OTG for phones/tablets) SD card slot (spring-loaded) MicroSD card slot (push-pull design, supports front & back insertion) 2. Card Compatibility SD slot: SD/SDHC/SDXC (up to 2TB) MicroSD slot: TF/microSDHC/microSDXC (up to 1TB) 3. Performance USB protocol: USB 3.0 (backward compatible with 2.0/1.1) Theoretical max speed: 5Gbps Real-world transfer speeds: • Read: 90–100 MB/s • Write: 30–90 MB/s (depending on card quality) 4. Chipset Skyworth GL3213S + AQ3410 for stable data transmission and dual-interface management 5. Operating System Compatibility Windows 7/8/10/11 macOS 10.12+ Linux kernel 3.0+ Android (OTG required)