Securedigital sd sdhc card memory size 16 gb read speed 45 mbs write speed 10 mbs bus interface uhs i file format fat32 operating voltage 27 36 v device class car radio macbook tv dslr digital camera camcorder computer printer functions write protection switch sdhc class 10 uhs speed class u1 dimensions 32mm x 24mm x 21mm weight 2 g