Introducción
This manual provides instructions for the Rocketek RT-CR3A USB 3.0 Memory Card Reader/Writer. This device facilitates high-speed data transfer between various memory card types and your computer via a USB 3.0 interface.
Características del producto
- Two media slots: one for standard SD/MMC cards and one for Micro SD cards.
- Supports SDXC up to 2TB, SDHC, SD, MMC, RS-MMC, Micro SDXC, Micro SD, Micro SDHC card, and UHS-I cards.
- Built-in card cover design for secure storage of inserted cards.
- Plug and play functionality; supports hot swapping.
- USB powered (no external power or battery required).
- Super speed USB 3.0, backward compatible with USB 2.0/1.1.
- Automatic memory card detection.
- LED status indicator: solid when connected, flashing during data transfer.

Image: The Rocketek RT-CR3A card reader showing its compact design and a blue LED indicator when connected.

Image: The Rocketek RT-CR3A card reader illustrating its 360-degree rotatable protective cover for the USB connector.
Configuración
- Conectar a la computadora: Insert the USB 3.0 connector of the RT-CR3A into an available USB port on your computer. For optimal performance, use a USB 3.0 port. The device is backward compatible with USB 2.0 and 1.1 ports.
- Instalación del controlador: The device is plug-and-play and typically does not require additional driver installation on most operating systems (Windows, Mac OS). Your computer should automatically detect and configure the device.
- Indicador LED: A blue LED light will illuminate when the device is successfully connected and powered.

Image: The Rocketek RT-CR3A card reader connected to a laptop, demonstrating its use for high-speed data transfer.
Instrucciones de funcionamiento
Inserción de una tarjeta de memoria
The RT-CR3A features two card slots: one for standard SD/MMC cards and one for Micro SD cards.
- For SD/MMC Cards: Open the built-in card cover. Gently insert your SD, SDHC, SDXC, MMC, or RS-MMC card into the larger slot with the contacts facing down until it clicks into place. Close the cover for secure storage.
- For Micro SD Cards: Gently insert your Micro SD, Micro SDHC, or Micro SDXC card into the smaller slot with the contacts facing down until it clicks into place.
The LED indicator will flash when data is being accessed or transferred.

Imagen: Un primer plano view of the Rocketek RT-CR3A, illustrating an SD card partially inserted into its slot with the protective cover open.
Transferencia de datos
Once a memory card is inserted and detected, it will appear as a removable drive in your computer's file explorer. You can then drag and drop files, copy, paste, or cut data between your computer and the memory card.
Note: While the device has two slots, it may only read one card at a time. If both are inserted, remove one and reinsert the device if only one card is detected.
Tipos de tarjetas compatibles
The Rocketek RT-CR3A supports a wide range of memory card formats:
- SD Card (Secure Digital)
- SDHC (Secure Digital High Capacity)
- SDXC (Secure Digital eXtended Capacity) up to 2TB
- UHS-I SD cards
- MMC (MultiMediaCard)
- RS-MMC (Reduced Size MultiMediaCard)
- Tarjeta Micro SD
- Micro SDHC
- Micro SDXC
- Mini SD (requires an adapter, not included)

Image: A visual representation of the different types of SD and Micro SD cards compatible with the Rocketek RT-CR3A card reader.
Mantenimiento
- Limpieza: Utilice un paño suave y seco para limpiar el exterior del dispositivo. Evite usar limpiadores líquidos o disolventes.
- Almacenamiento: When not in use, keep the card reader in a clean, dry place. Utilize the built-in card cover to protect inserted cards and the USB connector.
- Manejo: Evite dejar caer el dispositivo o exponerlo a temperaturas extremas o humedad.

Image: The Rocketek RT-CR3A highlighting its compact and anti-lost design, including a keychain loop for portability.
Solución de problemas
Dispositivo no detectado
- Ensure the card reader is fully inserted into a functional USB port.
- Pruebe con un puerto USB diferente en su computadora.
- If using a USB hub, try connecting the reader directly to the computer.
- Reinicie su computadora.
Tarjeta de memoria no detectada
- Ensure the memory card is correctly inserted into the appropriate slot with contacts facing down.
- Try removing and reinserting the memory card.
- Test the memory card in another device to confirm it is functional.
- If multiple cards are inserted, remove one and reinsert the card reader into the USB port.
Transferencia de datos lenta
- Ensure the card reader is connected to a USB 3.0 port on your computer for optimal speed. USB 2.0/1.1 ports will result in slower transfer rates.
- The speed of data transfer also depends on the speed class of your memory card.
Presupuesto
| Característica | Especificación |
|---|---|
| Modelo | RT-CR3A |
| Interfaz | USB 3.0 (compatible con versiones anteriores USB 2.0/1.1) |
| Tipos de tarjetas compatibles | SD, SDHC, SDXC, UHS-I, MMC, RS-MMC, Micro SD, Micro SDHC, Micro SDXC |
| Capacidad máxima | SDXC up to 2TB |
| Sistema operativo | Mac OS, Windows |
| Dimensiones (LxAnxAl) | 4.72 x 2.56 x 0.71 pulgadas (aprox. 120 x 65 x 18 mm) |
| Peso del artículo | 1.44 onzas (aprox. 40.8 gramos) |
| Características especiales | Plug & Play, Built-in Card Cover, LED Status Indicator |

Image: A diagram illustrating the physical dimensions of the Rocketek RT-CR3A card reader.
Garantía y soporte
Rocketek provides a 24-month manufacturer's warranty for this product.
For technical support or warranty claims, please contact Rocketek customer service. Refer to the product packaging or the official Rocketek websitio para información de contacto.
Free lifetime technical support is also available.
Información de seguridad
- No intente desarmar o modificar el dispositivo.
- Mantener fuera del alcance de los niños.
- Evite la exposición al agua u otros líquidos.
- Deseche el dispositivo de forma responsable de acuerdo con las regulaciones locales sobre residuos electrónicos.