1. Easy Circuit Testing The builtin light in the handle glows brightly when a circuit connection is complete, providing a clear visual indication of electrical continuity. This feature ensures quick and accurate diagnostics for automotive electrical systems. 2. Versatile Testing Tool This car electric testing lamp is for testing automotive, light sockets, and other electrical components. Its versatility makes it an essential tool for both professional mechanics and DIY enthusiasts. 3. Durable and Portable Made from ABS material, this testing lamp is both durable and lightweight. Its compact size of 14cm makes it easy to carry and use in various automotive scenarios. 4. Precise Wire Piercing Equipped with a steel probe, this tester easily pierces through wire insulation to check circuits without causing damage. Its precision allows for efficient testing of various automotive components.