Micro sd card micro sdhc card memory size 4 gb read speed 40 mbs write speed 40 mbs memory type mlc file format fat32 operating voltage 27 36 v suitable for full hd recording 4k recording 360 recording 3d recording sports photography device class digital camera dslr camcorder computer tablet pc mp3 player mobile phone printer macbook functions ecc manufacturers warranty 30 years standard sd 20 sdhc class 6 adapter sd card adapter ope