The Mastech MS2001 digital clamp meter is a handheld electrical measuring instrument used to measure current, voltage, resistance, and other electrical parameters without direct contact with live wires. It features a clamp jaw that detects AC or DC current by surrounding a conductor, ensuring safe and convenient measurement. The device usually includes a digital display, auto-ranging function, data hold, and overload protection for accurate readings. It may also test continuity, diodes, and capacitance depending on the model. Widely used by electricians, technicians, and engineers, it is suitable for industrial maintenance, electrical installation, troubleshooting, and repair work, offering reliable performance, safety, and precision in various electrical applications.