... .Support for iPad all version 3 USB 5 in1 High Quality Card Reader USB HUB For iPad SpecificationsDescription :Features:Brand ... SD(HC), MS DUO, M2, T-Flash card reader imports photos from your camera'sSD(HC), MS ... 3.22 support 100mA current , but the 4.2 only 20mA current. your usb or SD card current ... is overload 20mA,you need use the usb power. for ipad card reader with usb hub ...