ST180 Digital Clamp Meter Multimeter Tester 4000 Counts Lighting - LED flashlight lighting is used to prevent the risk of electric shock. The multimeter has a built-in flashlight function, which is convenient for locating wires in dark environments and can also be used as an emergency flashlight.Safety - The NCV non-contact sensing distance determines the speed of the alarm sound. When an AC voltage is detected nearby, the multimeter screen will display ---- and emit an alarm sound while the LED flashes red.Bright - The LCD backlight ensures a bright and clear screen display. In dark environments, turning on the backlight allows for clear visibility of the screen values.Accurate - The multimeter accurately measures AC current without the need to physically touch or damage the wires.Beep detection - The multimeter can detect if a wire is connected or broken. When the meter pen is connected to both ends of a wire, a beeping sound indicates that the wire is connected; the absence of a beeping sound indicates a broken wire.