Securedigital sd sdxc card memory size 64 gb read speed 85 mbs write speed 20 mbs bus interface uhs i mode of transmission uhs104 file format exfat operating voltage 2 7 3 6 v suitable for full hd recording device class macbook dslr digital camera printer camcorder functions write protection switch standard sd 301 sdhc class 10 uhs speed class u1 adapter without adapter dimensions 32mm x 24mm x 21mm weight 2 g