Micro sd card micro sdxc card memory size 64 gb read speed 22 mbs bus interface uhs i file format exfat operating voltage 27 36 v device class digital camera dslr camcorder mp3 player tablet pc mobile phone computer printer macbook functions write protection switch standard sd 30 sdhc class 10 adapter sd card adapter dimensions 15 mm x 11 mm x 1 mm weight 04 g