Securedigital sd sdhc card memory size 16 gb read speed 17 mbs write speed 5 mbs memory type mlc file format fat32 operating voltage 27 36 v device class car radio macbook tv dslr digital camera camcorder computer printer functions write protection switch standard sd 20 sdhc class 4 adapter without adapter dimensions 32mm x 24mm x 21mm weight 2 g