USB Memory Card Reader Rocketek ® 4 Slots USB 3.0 Card Reader Adapter | Simultaneously read and write on two cards

Model NO.: RT-CR4

  • Dual SD(MMC) Slots and Micro SD Slots, Suppport transfer data between 2 cards
  • Plug and play; Hot swapping; USB power (no external power or battery); Supper speed USB 3.0 and backward compatible with 2.0/1.1.
  • Support SDXC up to 2TB, SDHC, SD, MMC, RS-MMC, Micro SDXC, Micro SD, Micro SDHC Card, and UHS-I Cards.
  • Compatibility:Windows 2000/ME/XP/Vista/7/8(32bit/64bit) and MAC OS 10.X or above version.
  • LED status indicator, on when connected, flashing when transfering data. Free lifetime technical support and 24-month manufacturer's warranty.


Transfer your data faster than ever with premium quality Rocketek USB 3.0 card reader. It can read two cards at the same time, it is convenient transfer data between two cards. Plug and move flexibly with the USB Interface. Soft blue and flashing LEDs indicate idle and data transfer status. 

-4 slots:2 slots SD/MMC and 2 slots Micro SD/T-flash 
-RTS5306 chipset 
-LED status indicator 
-USB Interface 

Card Compatibility 
-SD slot:SDXC/UHS-I SD/SDHC/SD/Extreme SD/Extreme III SD/Ultra II SD/MMC(mini SD/mini SDHC/RS-MMC/HS RS MMC may need a adapter) 
-Micro SD(T-flash) slot:Micro SDXC/Micro SDHC/Micro SD 

System Requirements 
Windows 2000/ME/XP/Vista/7/8(32bit/64bit) and MAC OS 10.X or above version. 

Please Note: 
1, For older versions of Windows XP or Mac OS X, you may need to install operating system upgrades / patches to support the exFAT file system of many high capacity cards of 64GB or higher. 
2, Data transfer rates are subject to the speed of the memory card itself, you can fully enjoy the transfer rates of current high speed cards formats: SDXC, Micro SDXC, UHS-I. 
3, Rocketek offer great customer service.please email us with any questions or concers.