Securedigital sd sdhc card memory size 4 gb read speed 22 mbs file format fat32 operating voltage 27 36 v series hama high speed gold device class car radio macbook tv dslr digital camera camcorder computer printer labeling field functions write protection switch manufacturers warranty 10 years standard sd 20 sdhc class 10 dimensions 32mm x 24mm x 21mm weight 2 g