Micro sd card micro sdhc card memory size 4 gb read speed 10 mbs write speed 4 mbs file format fat32 operating voltage 27 36 v device class digital camera dslr camcorder mp3 player tablet pc mobile phone computer printer macbook functions write protection switch sdhc class 4 adapter sd card adapter dimensions 15 mm x 11 mm x 1 mm weight 04 g