Compact tester screwdriver with built-in indicator diode Key benefits Clear live-current indication: an indicator diode inside the handle glows when current passes, so you can quickly confirm whether a conductor is live. Safer handling: the shaft has an insulated cover to reduce the risk of short circuits and provide electrical protection during basic checks. Secure grip: the environmental shank features an anti-skid particle texture for a steady, slip-resistant hold. Reliable contact: metal tip provides consistent contact with screws, terminals, and conductor ends. What it is and how it works A simple handheld tester that indicates presence of current by lighting an internal diode when the tip contacts a live conductor and you touch the rear contact point. No complex setup required: touch the tip to the point to test and observe the diode in the handle. Key attributes Function: presence-of-current tester (indicator diode lights when current passes) Construction: metal tip for conductivity; insulated shaft to protect against short circuits; environmental shank with anti-skid particle design for comfort and safety Operation: visual indication via diode inside the handle Practical use scenarios Home electrical checks: quickly verify whether an outlet, switch or exposed conductor is live before performing basic maintenance. Troubleshooting fixtures and fittings: test lamp holders, switches and terminal connections to identify live connections. Quick onsite checks for electricians and DIYers: perform non-invasive checks during installations or repairs to confirm power presence. Safety and handling notes Use as a basic indicator only; it confirms presence of current but does not replace multimeters or professional testing tools for detailed measurements. Ensure the insulated shaft remains intact and the shank is clean and dry before use. Follow usual electrical safety practices when working near live circuits. What to expect Straightforward, low-complexity tester that indicates current presence by illuminating the handle diode, with an insulated shaft for added protection and an anti-skid shank for comfortable, secure handling.