Wide Compatibility The card can be used in multiple different devices including android based smartphones, interchangeable lens cameras, drones, or action cameras. Faster Loading Apps The SD card comes with an A1 rating which means that it works specifically well for using applications on your smart phone. The card will help deliver faster app launches and boosts performance levels. 4K UHD Ready SanDisk’s Extreme microSDXC card comes with UHS Speed Class 3 and UHS Speed Class 30z ratings which means the card lets your capture uninterrupted 4K UHD and full HD video. This is ideal for clarity recording outside even in the most hectic and action packed environments. Speed The SD card comes with improved speed with up to 90MG/s. This allows you to capture all the action however fast it is moving with extremely smooth video playback. Durability The Extreme microSDXC is built for high impact and action packed filming in the most extreme of environments. The card is therefore completely temperature, shock, x-ray and water proof.