Securedigital sd sdxc card memory size 64 gb read speed 95 mbs write speed 45 mbs bus interface uhs i file format exfat operating voltage 27 36 v series integral ultimapro suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class car radio macbook tv dslr digital camera camcorder computer printer sdhc class 10 uhs speed class u1 adapter without adapter dimensions 32mm x 24mm x 21mm weight