An AC 100-500V Voltage Tester (also called a test pencil or voltage tester screwdriver) is a simple tool used to detect the presence of live AC voltage in electrical outlets, switches, and wires.
Voltage range: AC 100-500 V
* Type: Contact voltage tester (neon test screwdriver)
* Indicator: Built-in neon lamp that lights up when live voltage is detected
* Body material: Transparent insulated plastic handle with metal clip
* Blade material: Hardened steel with insulated sleeve
* Functions:
* Detects live AC voltage
* Identifies the live (phase) wire
* Can be used as a small flat-head screwdriver
* Operating method: Touch the screwdriver tip to the conductor and place your finger on the metal cap at the end of the handle. If voltage is present within the rated range, the neon indicator lights up.