Securedigital sd sdhc card memory size 8 gb read speed 90 mbs write speed 40 mbs bus interface uhs i file format fat32 operating voltage 27 36 v series transcend ultimate suitable for 360 recording sports photography full hd recording 3d recording 4k recording device class digital camera dslr camcorder computer car radio tv printer macbook functions write protection switch manufacturers warranty lifelong standard sd 301 sdhc class 10