caption: The image shows a black and white photo of a machine with a number on it, which appears to be a synchronous converter. The machine is composed of several metal components, including a fan, a control panel, and several wires. The fan is connected to the control panel by a series of wires, and the wires are connected to a power source. The control panel has several buttons and knobs, and a display screen with a variety of information about the machine.