This board can check that in AC lines has the current flow just put the board close to AC lines ( approximately 1cm ), If in AC lines has the voltage flow, LED will be blinking / Sound alarm

Technical information:
- Check AC lines which have voltage 110VAC to 240VAC
- Require power supply 9VD or 9VDC battery
- Current consumed 25mA ( when LED is blinking )
- Indicator by RED LED / Alarm sound
- Distance to detect voltage in AC lines approximately 1cm
- Adjustable the sensitivity to detection / Volume of alarm sound
- PCB size 3.44" x 1.23"

Download User Manual