EZOPower OTG Micro-USB 3-Port USB 2.0 Hub Charging Cradle Docking Station with Card Reader - Black OTG card reader,Hub and rapid charging functions in docking,support CF,MS,SD,micro SD series memory cards.Suitable for use smart phone,tablet ,computer to read memory card,to play film,to enjoy music.Can rapidly charge all kinds of your loving devices when in charging mode. Plug and play function,no driver needed. Support memory card: (1):SD/SDHC/SDXC/EXTREME SD/EXTREME II SD/EXTREME III SD/ULTRA SD/ULTRA II SD/ULTRA II SD P PLUS/SD-ULTRA-X/ULTRA SPEED SD/SD PRO/SD ELITE PRO/HS SD/MMC/MMC 4.0 (2):Micro SD/micro SDHC/micro SDXC (3):MS/MS Pro duo/MS MG Pro/MS MG Pro duo/HS MS MG Duo/HS MS Pro duo (4):CF I/CF II/CF 3.0/CF 4.0/EXTREME III CF/EXTREME CF/ULTRA II CF/HS CF/XS-XS CF/CF ELITE PRO/CF PRO/CF PRO II. OTG card reader/Hub and charging function can be switched by button switch. OTG compatible Devices: Acer Iconia Tab 8, One 7, B1-720, A1-830; Asus VivoTab 8, Transformer book t100, Memo Pad 10, Dell Venue 8, 8 Pro; E-Fun Nextbook 10.1