What does a polygraph look like?

A polygraph, commonly known as a lie detector, typically consists of a large machine with multiple sensors and dials. It features a display screen that shows physiological responses such as heart rate, blood pressure, respiration, and galvanic skin response. The machine is connected to the subject via sensors attached to the fingers, chest, and sometimes the arm. Overall, it resembles a complex instrument with various wires and gauges designed to monitor and record bodily reactions during questioning.