The EW11A unit is a complete solution for connecting serial port devices to a network. This device supports a reliable, proven firmware stored in flash memory, an embedded web server, a full IP protocol stack, and standards-based encryption. It enables data transfer via Wi-Fi, simplifying data communication. Supports 802.11b/g/n wireless standard Supports UDP, Telnet, and Modbus protocols Supports RS485 to Ethernet/Wi-Fi conversion; serial speed up to 460800 bps Supports STA, AP, and AP+STA modes Supports smart configuration (app provided) Supports easy configuration via web interface or PC IoT service tool Supports security protocols including 3DES Supports web-based OTA wireless firmware upgrade Features internal PCB antenna Wide DC input range: 5–18 VDC Color: As shown Material: Plastic Dimensions: 61 × 26 × 17.8 mm (L × W × H) Package contents: 1 × Wireless module kit Note: Lighting conditions and display variations may cause slight color differences between the image and the actual product. Measurement tolerance: ±1–3 cm.