ZyXEL NSA-220. Total storage capacity: 0 GB, Hard drive capacity: 0 GB, RAID levels: 0, 1. Supported network protocols: TCP/IP, UDP/IP, NetBEUI. Weight: 1.5 kg. Operating relative humidity range: 20 - 95 %, Operating temperature range (T-T): 5 - 40 °C, Storage temperature range (T-T): -30 - 60 °C. Certification: CSA 60950-1 IEC 60950-1 EN 60950-1