Built-in NCV sensor probe, when strong AC signal is detected, red light turns on and buzzer sounds. Jaw opening size: 26mm / in. 【Digital LCD Display with Backlight】: It has a digital backlit display, with maximum display 4000 counts and reading height of 12mm, so you can read the data clearly when working in dim or low-light conditions, like electrical closets, under buildings, behind appliances, and in other enclosed spaces, and the convenient LED flashlight illuminates a dimly light area.
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