First2savvvHigh speed OTG Micro USB Adapter Hub 7 in 1 Card Reader for Samsung Galaxy Tab 3 10.1 GT-P5200 / GT-P5210 / GT-P5220 LTE. Galaxy Tab 3 8.0 SM-T310 / Tab 3 8.0 3G SM-T311 / Tab 3 8.0 LTE SM-T315. Galaxy Note 8.0 3G GT-N5100 / Galaxy Note 8.0 GT-N5110 / Galaxy Note 8.0 GT-N5120 LTE. Galaxy S3 GT-i9300 / Galaxy S3 GT-i9305 LTE / Galaxy S4 GT-i9500 / Galaxy S4 GT-i9505 LTE / Galaxy Note 3 GT-N9000, GT-N9005 LTE / Galaxy Note 2 GT-N7100, GT-N7105 LTE S5 3 USB 2.0 ports HUB and 4 Card reader(for MS/M2/SD(HC)/TF CARD) Support HI-speed USB devices, USB keyboard, U-disk, etc, support USB flash disk, card reader, most of mouses(small portion of mouses don't supported) Support MS, M2, SD(HC), SDHC, MMC, MMC2, RS MMC, UITRA2 SD, EXTREME SD, EXTREME 3 SD, TF (Micro-SD) up to 16GB, Support 4 devicesSupport MS, M2, SD (HC), SDHC, MMC, MMC 2, RS-MMC, SD UITRA2, EXTREME SD, EXTREME 3 SD, TF (Micro SD) up to 16GB, support 4 devices simultaneously. The Hub needs external 5V/1A power supply in the following cases:1. When you want to use High-power device such as the Mobile HDD, 2. When your tablet/cellphone's battery is low. Compatible with Micro USB Port Samsung Galaxy S2 / S3/ S4/S5/ Note2/ Note 8.0/ Tab3 and Micro USB Port smart phone which support "ON THE GO" function