-4xIntel i226-V 2.5GbE RJ45 LANs, 2xUSB3.0, 2xUSB2.0, 1xRJ45 COM console, 1x4G/3G SIM slot. N100 model: 1xDDR5 SODIMM non-ecc ram slot, support 4800MHz. -Support two storage: 1xM.2 NVMe/PCIe3.0x1 2280 SSD+1x2.5''SATA3.0 7mm SSD/HDD. -1xSIM slot, 1xMPCIE wireless slot, support WiFi/4G/3G(USB signal, 3 choose 1) connection. -Support 1xHDMI and 1xDP dual 4K video display. -Support AES-NI, ESXI, PVE, Watchdog, Auto power on, RTC, PXE boot, Wake-on-LAN etc. -All aluminum alloy fanless system with longer fins has better cooling efficiency with a temperature 10-15℃ lower and performance 20-25% higher than regular versions on the market. It has a longer working life time, noiseless and durable to work as long as 7x24 hours. We do not limit power consumption by default, it is flexible to change in BIOS if you worry heat or want lower consumption, also it is a good option to add a USB fan if you have. -It can be mounted back of monitor by VESA bracket(optional).