Features: brand new and high quality This product supports Wi-Fi, supports a complete TCP/IP protocol stack, and supports multiple data encryption methods to ensure data confidentiality. Data transmission through the wireless connection of this serial server makes product integration very easy. External antenna, small and easy to use, powerful. Support desktop, pasted, wall-mounted, and bundled installation. Standard RJ45 network interface. Support Modbus TCP, support Smartlink distribution network, support AP/STA function. Specifications: Material:ABS Size :Approx.6.1x2.6x1.8cm/2.4x1.02x0.71inches Color:Black Package: With 4PIN Terminal/With Network Cable Interface Package Includes: 1x Data Transfer Converter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.