Designed for action cameras, drones, and Android smartphones, the Professional SILVER Series 1066x UHS-I microSDXC Memory Card from Lexar features a storage capacity of 64 GB and supports maximum read speeds of up to 160 MB/s and maximum write speeds of up to 70 MB/s. This card has also been designed with the V30 Video Speed Class rating, which guarantees minimum write speeds of at least 30 MB/s. All of this provides the speed and storage you need to capture more adventures on the go. Aside from support for UHS-I, V30, and U3, Lexar also built this card with support for the Application Performance Class 2 (A2) spec, which includes optimizations to give Android users an improved mobile experience, delivering faster mobile app performance. The A2 spec allows the card to manage random read input-output access per second (IOPS) operations so it can quickly open apps and process accompanying tasks, such as audio, graphics, saved profiles, and in-app permissions. To help increase durability, Lexar designed this card to be resistant to water, shock, vibration, x-rays, and temperature extremes. Included is a microSD to SD adapter, allowing this card to be used in SD-compatible devices.