Micro sd card micro sdxc card memory size 64 gb read speed 30 mbs write speed 10 mbs bus interface uhs i mode of transmission uhs104 memory type mlc file format exfat operating voltage 2 7 3 6 v series a data premier device class digital camera dslr camcorder mp3 player tablet pc mobile phone functions ecc standard sd 30 sdhc class 10 uhs speed class u1 protective properties waterproof shockproof magnet proof x ray resistant temperature