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, simplifying data transmission. 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 with provided app Enables easy setup through web interface or PC IOTService tool Supports security protocols such as DES3 Supports web-based OTA wireless upgrade Features 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 display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3cm.