256GB microSD card for Nintendo Switch, A1 class with a read speed of 80MB/s. - Capacity: 256GB - Class: A1 - Read Speed: 80MB/s - Compatible Devices: Nintendo Switch, Android devices - Features: Can be used for purposes other than gaming I realized it wasn't compatible with my device after opening it. It has been opened, but it is unused. It is a genuine product purchased from Yamada Denki. Thank you.