Micro sd card micro sdxc card memory size 64 gb read speed 90 mbs write speed 45 mbs bus interface uhs i mode of transmission uhs104 file format exfat operating voltage 2 7 3 6 v suitable for 4k recording full hd recording sports photography 360 recording 3d recording device class digital camera dslr camcorder tablet pc mobile phone standard sd 301 sdhc class 10 uhs speed class u3 adapter without adapter dimensions 15 mm x 11 mm x 1 mm w