2
TYPES POWER SUPPLY: The circuit tester is powered via the vehicle battery or cigarette lighter, No Need for additional batteries or wiring. When the tool is first connected to a battery, it will sound a beep and the headlights will be on to illuminate the test area of the probe tip.
SAFETY PROTECTION: The circuit test tool is short-circuit protected, its internal circuit breaker will trip if it becomes overloaded. The quick self-test is a must before starting to test a circuit or component, to ensure that your tool is in good. offers a 24-month free warranty. No need to pay extra for warranty service, saving you a lot of money!