Micro sd card micro sdhc card memory size 4 gb read speed 10 mbs file format fat32 operating voltage 27 36 v device class digital camera dslr camcorder computer tablet pc mp3 player mobile phone printer macbook functions write protection switch sdhc class 4 adapter sd card adapter protective properties waterproof temperature resistant shockproof x ray resistant magnet proof dimensions 15 mm x 11 mm x 1 mm weight 04 g