High Speed USB 2.0 4 Slot SD Card Reader/Writer 4 slots on top, Support SD/SDHC/SDXC/MicroSD/MicroSDHC/MicroSDXC memory cards USB 2.0 high speed transfer between 4 cards without changing each memory cards Reads and write at same time, Support up to 200GB Hot swappable, plug and play, no driver needed Detachable USB 2.0 data transfer cable for easy carrying, Unit size: 35mm x 54mm x 45mm Cable length: 400mm, Plug & Play, no driver requires