Features: 1)Secure digital card 2)Card dimensions:32 x 24 x 2.1mm 3)Thickness: thicker than MMC card 4)Compatible with MMC card 5)High speed for read and write 6)Max. read speed: over 20MB/s 7)Widely used for digital cameras, mobile phones, music players, PDAs, video DV User guide: 1) your SD flash memory card the memory card slot on your computer, mobile phone, digital camera, or PDA 2)You can use the device as you normally do: creating, copying, editing and moving files 3)SD card can also be erased and reused Precautions: 1)Avoid using the flash memory card when the battery is low 2)When writing the card, make sure that the operation to be completed before removing the card　 3)The card is designed to fit easily the system only one way. Do not bend or force it the slot