| CPU | Micro processor with hardware RAID |
| Drive Bay | 4 x 2.5-inch or 3.5-inch SATA 3Gb/s The system is shipped without HDD. For the HDD compatibility list, please visit https://www.qnap.com/compatibility/ |
| Drive Compatibility | 3.5-inch SATA 6Gb/s, 3Gb/s hard disk drives 2.5-inch SATA 6Gb/s, 3Gb/s hard disk drives 2.5-inch SATA 6Gb/s, 3Gb/s solid state drives You can only use one disk type (HDD or SSD) in a RAID group. Combining different types of disk in one RAID group is not supported. TR-004 does not support the QDA-A2AR/ QDA-A2MAR. |
| Hot-swappable | |
| USB 3.0 port | 1 x Type-C USB 3.0 (USB 3.1 Gen 1) |
| Dimensions (HxWxD) | 168.5 × 160.2 × 219 mm |
| Weight (Net) | 1.85 kg |
| Max. number of HDDs/SSDs supported | 4 |
| Hard Drive Type | 4 x 2.5-inch or 3.5-inch SATA 3Gb/s |
| Operating temperature | 0 - 40 °C (32°F - 104°F) |
| Relative Humidity | 5~95% RH non-condensing, wet bulb: 27˚C (80.6˚F) |
| Power Supply Unit | External Power Adapter, 65W, 100-240V |
| Power Consumption: HDD Sleep Mode | 4.17 W |
| Power Consumption: Operating Mode, Typical | 18.21 W With drives fully populated |
| Fan | 1 x 120mm, 12VDC |
| Sound Level | 18.1 db(A) |
| Kensington Security Slot |