- Expanded Voltage Range : This electrical tester operates between 5V and 120V, making it ideal for quickly assessing car battery voltage and diagnosing issues, including alternator performance in vehicles like cars, trucks, SUVs, and boats. It's also perfect for checking the integrity of circuit connections in headlights, taillights, and fuses. - Clear Digital Readouts : The bright LED display ensures easy reading in any lighting condition, with 0.1V resolution providing precise digital results. The bidirectional LED on the circuit board simplifies battery load testing, where a red light shows positive polarity and a green light indicates negative polarity. - Flexibility and Convenience : Featuring a durable 96-inch spring wire, this tester offers exceptional flexibility during use. The anti-bending design prevents bad contact, while the large alligator clip allows for easy one-handed operation, improving efficiency when checking car battery capacity. - Durable and Safe Design : Built with a specialized circuit board and a comfortable plastic handle for better grip, this tester is designed to protect against electric shocks. The robust stainless steel probe effortlessly penetrates insulation, making it suitable for accessing hard-to-reach areas, ensuring reliable battery and circuit analysis. Applications : 1. Use it to quickly test car batteries before long trips or during regular maintenance checks. 2. Diagnose charging system issues in various vehicles to prevent breakdowns. 3. Inspect fuse connections and light integrity for enhanced vehicle safety.