SanDisk MicroSDXC Extreme 64GB A2 V30 UHS-1 (160MB / s) Without SDHC Adapter
 
Memory Class A2 / UHS-I / V30 / U3 / Class 10
Write speed 60 MB / s
Read speed of 160 MB / s
Supports 4K ultra HD and Full HD
This MicroSD from SanDisk has got A2 certification making it run running on various applications optimally to make your device more responsive.
make sure your smartphone and tablet support up to this capacity