Synology DS920+ Synology 4 bay NAS DiskStation DS920+ (Diskless), 4-bay; 4GB DDR4 CPU Intel Celeron J4125 4-core 2.0 GHz, burst up to 2.7 GHz Hardware encryption engine Yes (AES-NI) Memory 4 GB DDR4 onboard (expandable up to 8 GB)5 Compatible drive type • 4 x 3.5" or 2.5" SATA HDD/SSD (drives not included) • 2 x M.2 2280 NVMe SSD (drives not included) Hot swappable drive Yes External port • 2 x USB 3.0 port • 1 x eSATA port Size (HxWxD) 166 x 199 x 223 mm Weight 2.24 kg LAN 2 x Gigabit (RJ-45) Wake on LAN/WAN Yes Scheduled power on/off Yes System fan 2 (92 x 92 x 25 mm) AC input power voltage 100 V to 240 V AC Power frequency 50/60 Hz, single phase Operating temperature 0°C to 40°C (32°F to 104°F) Storage temperature -20°C to 60°C (-5°F to 140°F) Relative humidity 5% to 95% RH Maximum operating altitude 5,000 m (16,400 ft)