Securedigital sd sdhc card memory size 8 gb read speed 10 mbs write speed 4 mbs 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 operating temperature 0 to 60 c dimensions 32mm x 24mm x 21mm weight 2 g attention product can contain offers with different speeds