Features: Brand new and high quality This product is an industrial 8ch relays module controlled via Ethernet port, adopts Modbus RTU/Modbus TCPprotocols, supports PoE power supply, also comes with an ABS rail mount case. 4 LEDs and Networking indicators for indicating the MCU status and signal transceiving status. Supports sending Modbus RTU/TCPprotocol commands via Ethernet port to control relays and various devices. Supports Multiple Communication Modes, Adopts Modbus Protocol, Supports TCPServer / TCPClient / UDP Modes / UDPMulticast / HTTP / MQTT. Supports Modbus RTU protocol/Modbus TCPprotocol. Supports software and WebBrowsers Configuration, Obtaining Dynamic ViaDHCP, connecting to domain name server via DNSprotocol Power port: directly uses a power plug for power supply; Screw terminal: DC7~36V wide ranges power input; PoE port: IEEE802.3af PoE compliant Features flash on, flashoff function, by passing argument to the command, it is possible to turn on the relays for a while and then close it automatically. Onboards Optocoupler isolation, prevent the relays from being interfered by highvoltage circuit. Specifications: Material:Plastic Size:Approx.14.5x9cm/5.71x3.54inch Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Ethernet Module