The KOOTION 64GB Micro SD SDXC A1 V30 U3 Card is a high-speed memory card that offers fast file transfer speeds, smooth and continuous shooting, and is ideal for recording 4K and 1080P videos. It is compatible with a wide range of devices and offers reliable performance with features like water resistance, shock-proofing, and high or low-temperature resistance. The card also comes with an SD adapter for use with other devices. With read speeds of up to 90MB/s and A1 app performance, this memory card is suitable for use in cameras, smartphones, tablets, and more.