Features Applicable models: Samsung Galaxy Tab 10.1; Samsung Galaxy Tab 8.9 Support for MS; SD; SDHC; MMC; MMC2; RS MMC; UITRA2 SD; EXTREME SD; EXTREME 3 SD; TF ( Micro-SD )Perfectly support external U-diskbrowser and ES browser, reading and writingAccess to the first USB device will display SDA, second SDB, third SDCIBM small black rats, perfect use, inserts can be used, the sliding = move, left click = touch, roller = pagedropdownWhen screen is off, moving the mouse can wake up the screen