The document describes the ADAM-3600 expansion wireless intelligent RTU. It has a powerful 32-bit processor, memory, operating system, and SD card slot for data storage. It supports various programming and communication protocols. It has built-in analog and digital I/O and four expansion slots. It supports both wireless and wired communication modules. The device provides a rich I/O system with on-board and expansion I/O. It is presented as a cost-effective intelligent RTU for various applications.