High-Speed OTG Data Transfers for High-Resolution Media Files
You can now eliminate slow transfer speeds and tedious computer import delays after intensive photo shoots. The Ulanzi CR3 3-in-1 USB Card Reader High-Speed OTG Memory Reader incorporates high-speed controller architecture engineered to process massive 4K video clips and high-bitrate image files. Because the memory adapter supports simultaneous card access across dual media slots, offloading footage from mirrorless cameras, action cams, and aerial drones becomes completely effortless. Consequently, backing up project media and diving straight into post-production becomes second nature. If you need a compact daily pouch to protect your memory cards, OTG adapters, and mobile glass attachments on location, explore our Ulanzi OM-02 Bag.
Dual USB-C and USB-A Plug-and-Play Compatibility
Do not let interface compatibility issues disrupt your backup routine when moving files between different host devices. This versatile memory card hub features dual connector heads designed for seamless cross-platform performance:
Universal USB-C Interface: First, plug directly into modern MacBooks, iPads, Type-C laptops, and smartphones using OTG connectivity.
Standard USB-A Connector: Next, connect instantly to desktop work towers, power banks, and legacy computer ports without extra hubs.
Dual SD & MicroSD Slots: Finally, access standard SD, SDHC, SDXC, MicroSD, and TF cards without needing external adapter sleeves.
Rugged Metallic Construction for Outdoor Field Workflows
You will no longer worry about cheap plastic card readers cracking inside crammed gear backpacks on demanding location shoots. Built with a CNC-machined metallic body, the Ulanzi CR3 3-in-1 USB Card Reader High-Speed OTG Memory Reader provides rapid thermal heat dissipation during heavy file backups while resisting daily wear. Furthermore, protective end caps safeguard host connectors against dust, lint, and impact. For creators who prefer a larger high-capacity backpack to carry full camera bodies alongside editing laptops, check out our BP09 Tracker Camera Backpack 22L.
Streamlined Media Backup Hub for Desktop & Studio Suites
Do not delay backing up critical media until you return home to your main workstation. Combining instant mobile OTG card reading with physical studio controls creates an efficient end-to-end production setup. Therefore, you can preview high-resolution clips on tablets on set and transition straight to broadcast suites with full file integrity. For editors and streamers who manage their live desktop production systems after field offloading, pair your workspace with our ULANZI D200H CUSTOMIZED SCREEN.
Product Specifications Table
| Feature | Technical Specification Details |
| Product Model / SKU | CR3 (Ulanzi CR3 3-in-1 USB Card Reader High-Speed OTG Memory Reader) |
| Host Connectors | Dual USB-C (Type-C) & USB-A Hardware Interfaces |
| Media Card Slots | Standard SD Card Slot & MicroSD (TF) Card Slot |
| Data Protocol | High-Speed USB 3.0 OTG Protocol |
| Housing Construction | Anodized Aluminum Alloy Shell with Dual Protective End Caps |
| Card Compatibility | SD, SDHC, SDXC, MicroSD, MicroSDHC, MicroSDXC |
| OS Compatibility | macOS, Windows, iPadOS, iOS, Android, Linux |
| Primary Function | High-Speed Media Backup, OTG File Transfer & Offloading |
| Design Profile | Portable, High-Speed Dual-Connector OTG Memory Reader |












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