With the more frequent use of smartphones and tablet pcs for multimedia recording and playback there are increasing demands on the read and write speeds of dedicated memory cards this premier series memory card implements the latest sda 30 specification uhs i ultra high speed 1 in compliance with sd 20 class 10 speed and comes with an entry level price for consumers who want a dedicated card for their smartphone or tablet pc increased speed no increase in cost premier microsdhcsdxc uhs