| Model No. | SST-ECM21-E |
| Interface | PCI Express x4 |
| SSD Interface | M.2 (NGFF) |
| Support Length of M.2 SSD | 30mm, 42mm, 60mm, 80mm |
| Module Key | PCI-E x4-based M key |
| LED indicator |
Power ON: Red Read / Write: Green |
| Dimension | 120mm (W) x 23mm (H) x 104mm (D) |
| Net weight | 57g |