Micro sd card micro sdhc card memory size 4 gb write speed 4 mbs memory type mlc 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 manufacturers warranty 30 years standard sd 20 sdhc class 4 adapter sd card adapter operating temperature 25 to 85 c dimensions 15 mm x 11 mm x 1 mm weight 04 g