极空间A4 specifications and procurement support from Kewentech.
| Model | A4 |
| Product Type | NAS expansion unit |
| Compatible Models | 极空间Z4/Z4Pro系列 |
| Drive Bays | 4 bays |
| 硬盘规格 | 3.5-inchSATA III |
| Capacity per Drive | Maximum 20TB+ |
| Total Capacity | Maximum 80TB+ |
| 连接接口 | eSATA / USB-C |
| Cooling | 智能温控风扇 |
| Enclosure Material | Metal enclosure |
| 减震设计 | Supported |
| 即插即用 | Supported |
| Power Supply | 独立电源模块 |
| 指示灯 | 硬盘状态+电源灯 |