Specification:
The self-test function:
Usage: when using self-testing sign in one hand and take the tip in one hand touches the touch electrode.
Line On / off detection:
Usage: first-hand contact pin zero line, the other hand on the electric pen touch pole, written contact pin FireWire.
Phenomenon: On: indicates that the loop line is normal, there is no line breakage; unlit: line marked off here somewhere, did not turn on. Line-off detection: electrician maintenance staff are widely used in rice cookers, computers, washing machines and other daily household electric plug line testing equipment.