Micro sd card micro sdxc card memory size 64 gb read speed 22 mbs write speed 15 mbs bus interface uhs i file format exfat operating voltage 27 36 v device class tv digital camera dslr camcorder car radio mp3 player tablet pc mobile phone sdhc class 10 uhs speed class u1 dimensions 15 mm x 11 mm x 1 mm weight 04 g