The -EW11A unit is a complete solution for connecting serial port devices to a network. This powerful device supports reliable and proven flash memory storage, an embedded web server, a full TCP/IP protocol stack, and standards-based encryption. -EW11 serial server enables data transfer via Wi-Fi, making data transmission simple. Supports 802.11b/g/n wireless standard Supports TCP, UDP, Telnet, and Modbus TCP protocols Supports RS485 to Ethernet/Wi-Fi conversion with serial speed up to 460800 Supports STA, AP, and AP+STA modes Supports smart configuration (APP provided) Easy configuration through web interface or PC IOTService tool Supports security protocols such as DES and 3DES Supports web-based OTA wireless upgrade Supports internal PCB antenna Wide DC input range: 5-18VDC Color: As shown Material: Plastic Size: 61 x 26 x 17.8mm (L x W x H) Package Contents: 1 x Wireless module kit Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3cm.