Fanless system without cooling fan, no any noise, thicker and longer heat-sink fins for working as long as 7x24 hours durably. 6*Intel 2.5GbE I225-V b3 RJ45 LANs and 2*RS232 COM ports, support Windows, Linux and pfSense OS.Applied in Firewall, Network Server, Network Security, VPN Router etc. 1*mSATA SSD+1*2.5'' SSD/HDD installation supported. One embedded SIM card slot onboard, 3G/4G/WiFi optional. Full Aluminum Alloy Black color shell, Exquisite production craft on outside design with high quality, slim design 209*150*57MM. Low consumption save much energy and eco-friendly.Support Watchdog, AWAL, RTC, WOL, PXE, Reset functions.