The RTB-B221 with Expansion option is a modern and advanced electronic testing equipment manufactured by Rohde & Schwarz. The product is a Remote Test Box 2K-72 (RTB2K-72) that features a variety of features, such as input and output connections, monitoring and control channels, and the possibility of adding an expansion module. This expansion module provides additional functionality and convenience for testing in a variety of situations. Other features include an automatic calibration function, remote communication interface, a large display, and a high-resolution sensor. The RTB-B221 is designed for use with field sensors, development systems, and other advanced testing solutions. It is also suitable for diagnostic testing, analysis, and debugging of embedded systems. The product is ideal for a wide range of applications, including automotive, industrial, military and aerospace.