1、With NVC sensor head, there is no need to touch the direct induction of the two modes one-key switch. 2、Detection along the line, when the buzzer stops, the red light does not flash and the digital display has no signal strength. The position is the breakpoint. 3、This digital pencil can intelligently identify of the zero line, and no need to touch the zero line and the line. 4、Voltage sensing range is 12-1000V, which is very to use this digital pencil under most conditions. 5、With light weight, this digital pencil is very convenient for electricians to take to work. Item Type: Digital Test Pencil Product Material: ABS Voltage Sensing Range: 12-1000V Battery: 2 x AAA battery(not included) 1 x Digital Test Pencil 1 x User Manual