Low Voltage Circuit Tester Probe Pen – 3V-48V Automotive Electrical Diagnostic Tool Perfect for diagnosing electrical issues in cars, motorcycles, trailers, boats, and other low-voltage systems. Simply ground the alligator clip and touch the probe to the test point—if the handle light turns on, the circuit has power. Product Features: Durable Build: Features a chrome-plated, hardened carbon steel probe for long-lasting performance. The handle is made from high-quality plastic for a comfortable grip. Sharp Testing Tip: Easily pierces wire insulation to check circuits without needing to strip the wire. Instant Indicator: Built-in light in the handle illuminates when a live circuit is detected. Wide Voltage Range: Suitable for testing 3V to 48V DC systems. Portable & Lightweight: Compact design makes it easy to carry and store.