Securedigital sd sdxc card memory size 64 gb read speed 45 mbs write speed 10 mbs bus interface uhs i mode of transmission uhs104 file format exfat operating voltage 2 7 3 6 v device class macbook dslr digital camera printer camcorder labeling field functions write protection switch standard sd 30 sdhc class 10 uhs speed class u1 adapter without adapter dimensions 32mm x 24mm x 21mm weight 2 g