Securedigital sd sdhc card memory size 4 gb read speed 10 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 sdhc class 4 dimensions 32mm x 24mm x 21mm weight 2 g note product may contain offers with different speeds