ROVE Ultimate microSDXC memory card complies with the latest UHS Video Speed Class 30 (V30) standards. It writes up to 100MB/s speed, supporting 4K, Ultra HD, 3D videos, and burst mode. This card is Class 10, UHS Ultra High-Speed Class 3 (U3), and Video Speed Class 30 (V30), giving you the faster and smoother experience you need to shoot faster and longer. Application Performance Class 2 (A2) minimum random read speed at least 4000 IOPS Rated Speed Class 10, U3 is a great memory card choice for your Android smartphone to run and launch applications-multitasking faster than ever. ROVE Ultimate microSDXC memory cards with the A2 APP performance are ideal and compatible with Android smartphones and tablets. The ROVE Ultimate microSDXC cards deliver a cost-effective combination of Ultimate's wide capacity range, performance, and durability. It supports card health monitor functionality and allows pre-emptive storage management with every operating system. Its Plug & Play with the Ultimate wear-out protection offers the right combination to handle a 24/7 continuous recording workload.