1,SD card and MMC card is a kind of high safty Card can be using for many kinds of digital equipments such as digiatal carmera; mobile phone;PDA;MP3/MP4 player;LCD Advert Player;automobile Navigation system and elctronic books etc. 2,READ SPEED: 4.7MB/S(MAX) 3,WRITE SPEED: 2.5MB/S(MAX) 4,Size: 24mm X 32mm X 1.4mm 5,Weight:2g 6,Housing Material: Plastic 7,Power Consumption(mA)Read5.0/Write12.2/Standby2.7 8,Hi-Speed;High Performance;Highstroage 9,solution for FILES,IMAGES,MUSIC etc.