Product name: inductive digital display test pen Product material: chrome vanadium steel +ABS Product weight: 25G/38G Features Product description: night vision light with illumination Product packaging: polybag/insert card Scope use: suitable for direct detection of 12-220V AC and DC and indirect detection of fire zero line, break point and leakage of AC electricity, can also detect without electrical conductor on/off Automatic detection function Usage: self-test before use, hold the electric pen head with one hand - hand touch the test key directly Phenomenon: light on means the normal battery of the electric pen is sufficient , not lit means the battery needs to be replaced through the human body circuit, the detection screen and indicator emit blue light DC detection function Usage : one hand presses the direct detection button of the detection pen Press the negative of the battery with the other hand Phenomenon: the light is on means the battery of the measuring pen is sufficient, the light is not on means the battery is insufficient or already exhausted Zero fire line detection function Usage: press the button direct sensing of the electric pen with one hand, then put the tool head of the electric pen into the position of the fire line, zero line or ground line Phenomenon: the data relevant are displayed on the screen. Fire wire:12v36v55v110v220v zero wire/ground wire: affected by external electric field to show 12v or only light Detection function breakpoint Usage: press the breakpoint detection key, metal head contact The loaded wire tested, the pencil head moving phenomenon along the wire: if the lightning symbol disappears, it indicates that the break point is here