Thank you for viewing. This is a Nextorage CFexpress Type B 512GB [B2SE]. I used it about 5 times for work, but I am selling it because I switched to a higher-end card. This 512GB CFexpress B memory card achieves a maximum read speed of 1950MB/s and a write speed of 1900MB/s. Contents (Everything in the photos): - CFexpress Type B body - Included card case - Brand: Nextorage - Model Name: B2 SE - Capacity: 512GB - Read Speed: 1950MB/s - Write Speed: 1900MB/s - Type: CFexpress Type B Thank you for your consideration.