WI-FI Touch E-INK Book Memory :2GB Grey level :16 level Contrast Ratio:6:1 Operation so simple WI-FI Touch E-INK Book 6" SiPix Solution EBook, Samsung 2416 ARM9 400MHzBuilt-in Wifi with internet browserTouch control interfaceEpub, PDF, txt, jpg, and Adobe DRM format supportedSuper Slimm with only 8.9mmLight weight only 240 gramMicro SD cardColor Hardcase