Interface definition Interface definition of the whole machine AIO-1684XQ provides rich interfaces, including: 12V power interface (5.5*2.5mm) 4 x USB 3.0 2 x Gigabit Ethernet TF card slot SIM card slots x 3 Fan interface Power button Reset button Debug serial port (labeled as "Debug" in the diagram) Industrial serial ports (RS485, TTL) Mini PCIe interface (4G LTE) M.2 interface (5G Module) SATA interface (SATA 3.0 HD) The specific details are as follows: 4G Module Antenna Connection Antenna Specifications: Stick Antenna 4GLTE-5dB; Round Head