The EW11A unit is a complete solution for connecting serial port devices to a network. This powerful device supports reliable and proven firmware stored in flash memory, an embedded web server, a full TCP/IP protocol stack, and standards-based encryption. The EW11A serial server enables data transfer via Wi-Fi, making data transmission simple and efficient. Supports 802.11b/g/n wireless standard Supports TCP/UDP/Telnet/Modbus protocol Supports RS485 to Ethernet/Wi-Fi conversion with serial speed up to 460800 Supports STA/AP/AP+STA mode Supports smart configuration (APP provided) Easy configuration through web interface or PC IOTService tool Supports security protocols such as AES/DES3 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: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement allows an error of +/- 1-3cm.