The AEMC CA7024 Fault Mapper is a portable cable tester and fault locator that detects open circuits, shorts, and measures cable lengths up to 2000 meters. It features adjustable velocity of propagation, built-in cable libraries, manual Vp selection, and a tone generator for tracing cables. The device has a large backlit LCD display for easy reading, automatic impedance compensation, and a measurement range of up to 6000 feet. Ideal for locating faults, measuring cable runs, and troubleshooting wiring in various applications with high precision and ease of use.