Interface definition Interface definition of the whole machine EC-R3588SPC provides rich interfaces, including: 1 x HDMI2.1 (Max output support 8K@60Hz) 1 x USB3.0 OTG(Type-C) 1 x Display Port1.4 (Max output support 8K@30Hz) 1 x 4G LTE 1 x SIM card slot 1 x CAN 3 x RS232 2 x RS485 1 x SATA3.0 or PCIe2.0 1 x RELAY(Relay output) 1 x INPUT(Optocoupler isolation input) 3 x LED(One tricolor led, two monochrome leds) 1 x TF Card 1 x USB3.0 1 x USB2.0 (Two USB2.0 are led by a 20-pin pin row) 1 x WIFI 1 x Bluetooth 2 x RJ45 (One supports 1Gbps, and the other supports 100Mbps) 1 × 3.5mm Headphone (V1.1 version support recording) The details are shown below: