Designed for automotive use, this circuit tester helps you quickly verify vehicle electrical circuits and identify power flow issues. Voltage display with LED indicators provides an at-a-glance reading of the system voltage, so you can assess status without guesswork. Wide compatibility: suitable for 3.5 to 36V DC systems, effectively probing the car power circuit in most cars, trucks, and light vehicles. Comes in a handy kit for portable, on-vehicle testing and various circuit tasks, making it a versatile addition to your toolkit. Blue color for easy identification, offering a reliable and durable tool for automotive electric circuit testing. Use scenarios - Before wiring aftermarket devices: confirm the circuit is powered and within the expected voltage range. - Diagnose faults: check voltages along a circuit to locate where power drops or a break occurs. - Battery and charging checks: verify supply voltage at key points to assess battery or alternator health.