Look Measurements Measurements: 100 x 69.85 x 6.8 mm / 3.94 x 2.75 x 0.28 " 45 g (1.59 oz) in weight Keepsake 500 GB, 1 TB, or 2 TB of QLC NAND flash capacity is available. Environment of Operation Temperature range for operation: 0°C (32°F) to 70°C (158°F). Voltage at Operation (5V±5%) Sequential Performance For CrystalDiskMark, read/write Up to 550/500 MB/s for 2 TB Up to 550/500 MB/s for 1 TB 500 GB to 550 MB/s maximum 4K Iometer Random Read/Write Up to 81,000/80,000 IOPS with 2 TB Up to 57,000/79,000 IOPS, up to 1 TB, and up to 500 GB, respectively Written Terabytes (TBW) 500 GB/2 TB, 400 TBW, and 1 TB, 200 TBW 100 TBW Average Interval Between Failures Two million hours Drive Writes Per Day (3 years): 0.19 Note: Due to the host, speed may vary.