RAYSUN 7 in 1 Micro USB Connection Kit OTG Card Reader - USB Hub SD(HC)/MS/M2/TF/3 USB 2.0 Port Card reader for Galaxy Tab 10.1 / Tab 4/ S3/ S4/ and other Cellphone with OTG Function 1, 7 in 1 Micro USB OTG Card Reader - Support the tablets and cellphones with OTG function only 2, Support MS, M2, SD(HC), SDHC, MMC, MMC2, RS MMC, UITRA2 SD, EXTREME SD, EXTREME 3 SD, TF (Micro-SD); 3, 3 USB 2.0 high speed transfer port, support keyboard and mouse(small portion K/B and Mouse don't supported); 4, Support photos, video formats such as transferring files, and USB flash disk, card reader. 5, Note - This card reader + hub has a DC facility, adapter is optional (rarely required), but your smartphone/tablets can not provide enough power if you connect a hard disk to this hub, a 5V power supply is required.