The "Speed" is specified by manufacturer by using its own optimal testing environment. (However, actualperformance will be varied with different environment of individual device.). lifetime warranty for flash memory.
The Toshiba High Speed Standard microSD™ Cards are fully compliant with the latest SD Association specification. Speed Class: UHS speed class 1. The Toshiba Exceria™ microSDHC™ series is excellent for transferring Full HD videos or high resolution photographs.