Atd Tools Cordless Professional Circuit Tester

Features and Benefits:

• Features: Tests circuits from 3 to 28 Volts DC
• LED light and buzzer indicator
• Does not require a ground wire or clip
• Safe for work on automotive computers, ECMs, airbags, etc.
• Special V-tip allows safe piercing and can be removed to test hard-to-reach places
• Operates on replaceable long-life "N" or "LR-1" size alkaline batteries (included)



Unlike traditional test lights, the ATD-5503 utilizes a cordless design that eliminates the need for a ground wire or clip, allowing for much faster diagnostics in cramped engine bays. It works by completing the circuit through the user's hand (body ground), triggering an LED light and buzzer when voltage is detected. Because it is specifically engineered to be safe for automotive computers and airbags, it is a go-to tool for sensitive modern vehicle electronics.