• Voltage Detection: The primary function of a tester screwdriver is to determine if a circuit or an electrical component is live. It helps identify the presence of voltage in electrical outlets, switches, and wiring.
• Indicator Light: Most tester screwdrivers have an integrated neon light or LED that lights up when voltage is detected, providing a visual indication of electrical current.

A test screwdriver, is a specialized tool used primarily for checking the presence of electrical voltage in circuits. Here’s a detailed description:

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