Securedigital sd sdhc card memory size 16 gb read speed 18 mbs write speed 8 mbs file format fat32 operating voltage 27 36 v series transcend premium device class car radio macbook tv dslr digital camera camcorder computer printer functions write protection switch standard sd 20 sdhc class 6 adapter without adapter dimensions 32mm x 24mm x 21mm weight 2 g