Main features of ETH 01 gateway: Using dual-core Xtensa 832-bit LX6 microcontroller. Integrated SPI flash memory 32 Mbit/SRAM 520 KB Support TCP server, TCP client, UDP server, UDP client working mode Supports four data ports of serial port, wifl, Ethernet and Bluetooth to be combined in pairs, and data is transparently transmitted Support to connect to the network via wired network or wifi to upgrade the firmware Support wifi to connect to the Internet or LAN through the router, establish tcp/udp connection, and access the user's designated service Device. Support wired network access Support user secondary development Industrial grade working temperature range: -40~+85 Serial port baud rate: 80-5000000 Network protocol: IPv 4, tcp/udp Software encryption: AES/RSA/ECC/SHA colour: black Material: plastic Size: about 55x26mm Package Contents: 1 x gateway module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.