The Micro SD memory card is used in the smartphone, camera or MP3 Player. With an adapter, you can use full-size SDHC card as they also. That worked at least for me. The card has been recognized everywhere. The transmission speed reached at me any 30MB / sec, but it's also stated "up to 30MB / sec.".
The high storage capacity can be for example in the camera now record all of the highest quality. For it even fit up videos in HD quality. And the space is more than enough.
I can only recommend this memory card. She is reliable and of good quality.