Product Model Number: SE-CFEXB320S1700 High Durability pSLC Method: Maximum Read Speed: 1700MB/s Maximum Write Speed: 1500MB/s Sustained Read Speed: 1600MB/s Sustained Write Speed: 1400MB/s Since this is an unopened product, operation has not been checked. - Brand: SUNEAST - Capacity: 320GB - Read Speed: 1700MB/s - Write Speed: 1500MB/s