Ordering P/N TS-853A-4G TS-853A-8G CPU 14 nm Intel® Celeron® N3150 1.6GHz quad-core processor (burst up to 2.08GHz) Floating Point Unit ? Hardware Encryption ? (AES-NI) GPU 8th generation Intel HD Graphics System memory TS-853A-4G: 4GB (2 x 2GB) TS-853A-8G: 8GB (2 x 4GB) Memory Expandable Up To 8 GB Total Memory Slots 2, SODIMM DDR3L-1600 (*For dual-DIMM configurations, you must use a pair of identical DDR3L modules.) Flash Memory 512MB Maximum Number of Hard Drive 8 Hard Disk Drive Hot-swappable 3.5" or 2.5" SATA 6Gb/s, SATA 3Gb/s hard drive or SSD LAN Port 4 x Gigabit RJ-45 Ethernet port USB 4 x USB 3.0 port (Front:1, Rear:3) Support USB printer, pen drive, and USB UPS etc. Video Output 2 x HDMI, up to 4K 2160P Ultra HD support Audio Input 2 x 6.3mm microphone jacks (dynamic microphones only) Audio Output Line Out Jack (for amplifier or headphone amplifier) LED Indicators Status, USB, HDD 1-8 LCD Panel Mono-LCD display with backlight Buttons System: Power button, USB one-touch-backup button, Reset button IR Receiver ?, Support QNAP RM-IR002, RM-IR003 and MCE-compatible Remote Control Other Interface Kensington security slot, console port (system maintenance) Alarm Buzzer System warning Form Factor Tower Dimensions 185.2(H) x 298.2(W) x 235(D) mm 7.29(H) x 11.74(W) x 9.25(D) inch Weight Net: 7.3 kg (16.08 lbs) Gross: 8.6 kg (18.94 lbs) Power Consumption (W) System sleep mode: 1.91W HDD standby: 32.71W In operation: 58.8W Temperature 0-40°C Relative Humidity 5~95% RH non-condensing, wet bulb: 27°C Power Supply ATX 240W, 110-240V AC, 50-60Hz, 5A Fan 2 x 12cm quiet cooling fan (12V DC)