Micro sd card micro sdhc card memory size 16 gb read speed 90 mbs write speed 45 mbs bus interface uhs i file format fat32 operating voltage 2 7 3 6 v series integral ultimapro x suitable for 4k recording full hd recording 360 recording 3d recording sports photography device class mobile phone tablet pc computer dslr digital camera camcorder printer macbook manufacturers warranty 5 years standard sd 301 sdhc class 10 uhs speed class u3