The 64GB SanDisk Extreme microSDXC card is UHS-I compatible and offers fast transfer speeds of 90MB/s. - Brand: SanDisk - Model: Extreme microSDXC UHS-I - Capacity: 64GB - Speed Class: V30 - UHS Speed Class: U3 - Adapter: Included - Maximum Transfer Speed: 90MB/s - Video Recording Speed: 60MB/s Thank you for viewing.