The for -EW11A unit is a complete solution for serial port device connecting to network. This powerful device supports a reliable and proven stored in flash memory, an embedded web server, a full TCP/IP protocol stack,and standards-based () encryption. For -EW11A serial server for data transfer via Wi-Fi, which makes the data transformation very simple. Support 802.11bgn Wireless Standard Support TCP/UDP/Telnet /Modbus TCP Protocol Support RS485 to Ethernet/Wi-Fi Conversion, Serial Speed 460800 Support STA/AP/AP+STA Mode Support V8 Smart Config(Provide APP) Support Easy Configuration Through Web Interface or PC IOTService Tool Support Security Protocol Such As //DES3 Support Web OTA Wirelss Upgrade Wide DC Input 5-36VDC Colour:Black Material:Plastic+Metal Package Contents: 1 * RS485 to WiFi Serial Device Server 1 * 4 Pin terminal 1 * fixed bracket Only the above package content, other products are not included. Note: Light reflection 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.