Qnap TS 451 4 Bay Storage

CPU: Intel Celeron J1900 quad core 2.0 GHz processor (burst up to 2.42 GHz)
CPU Architecture: 64 bit x86
Graphic Processors: Intel HD Graphics
Floating Point Unit: Yes
Hardware accelerated Transcoding: up to 1080P
System Memory: 2 GB SO-DIMM DDR3L (1 x 2 GB)
Maximum Memory: 8 GB (2 x 4GB)
Memory Slot: 2 x SO-DIMM DDR3L (For dual DIMM configurations, you must use a pair of identical DDR3L modules.)
Flash Memory: 512MB (Dual boot OS protection)
Drive Bay: 4 x 3.5 inch SATA 6Gb/s, 3Gb/s (The system is shipped without HDD.)
Drive Compatibility
3.5 inch SATA hard disk drives
2.5 inch SATA hard disk drives
2.5 inch SATA solid state drives
Hot swappable: Yes
SSD Cache Acceleration Support: Yes
Gigabit Ethernet Port (RJ45): 2
Jumbo Frame: Yes
USB 2.0 port: 2
USB 3.2 Gen 1 port: 2
IR Sensor: (RM-IR002 & MCE)
HDMI Output: 1, (up to 1080p)
Form Factor: Tower
LED Indicators: Power/Status, LAN, USB, HDD1-4
Buttons: Power, Reset, USB Auto Copy
Dimensions (HxWxD): 177 × 180 × 235 mm
Weight (Net): 3kg
Weight (Gross): 4.3 kg
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: 90W adapter, 100-240V
Power Consumption: HDD Sleep Mode : 15.78 W
Power Consumption: Operating Mode, Typical 33.88 W
Fan: 1 x 120mm, 12VDC
Sound Level: 16.9 db(A)
System Warning: Buzzer
Max Number of Concurrent Connections (CIFS): 800