Digital LED Circuit Tester 5-120V Backlit Auto Voltage Tool

Heavy Duty Digital LED Circuit Tester – 5V to 120V

Whether you're a seasoned mechanic or a dedicated DIYer, this Digital LED Circuit Tester is the versatile, reliable tool you need for fast and accurate electrical diagnostics on cars, trucks, SUVs, and household systems. Featuring a bright backlit LED display and a wide 5V–120V testing range, it takes the guesswork out of electrical troubleshooting.

Made in Mainland China.

Key Features

• Wide Voltage Range (5V–120V): Accurately measures voltages across a broad spectrum, making it suitable for automotive, marine, RV, and general electrical applications.
• Bright Backlit LED Display: Crystal-clear readings in any lighting condition — from a sunny driveway to a dimly lit garage or workshop.
• Advanced Diagnostic Probe: Engineered for quick, precise circuit detection to help you identify faults efficiently, saving time and effort.
• 1.8m (5.9 ft) Flexible Spring Wire: Extended reach lets you access hard-to-get areas across large engine bays or electrical panels with ease.
• Secure Alligator Clip: Sturdy, reliable clip ensures a firm grip for effortless one-handed operation during battery tests and diagnostics.
• Multi-Purpose Tool: Works as a voltage tester, bulb tester, and circuit tester — three tools in one compact design.

Specifications

• Voltage Range: 5V – 120V DC
• Display: Backlit Digital LED
• Wire Length: 1.8m (5.9 ft) flexible spring wire
• Material: Durable plastic housing
• Color: Black
• Battery: Not required (self-powered from tested circuit)
• Package Includes: 1× Digital LED Circuit Tester

Who Is This For?

This tester is ideal for auto mechanics, electricians, and home DIYers who need a fast, dependable way to check circuits on cars, trucks, SUVs, motorcycles, boats, and more. It's also great for general home electrical diagnostics wherever a 5V–120V test range applies.

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Notes

• Product images may not reflect actual size — please refer to the specifications listed above.
• Slight measurement differences may occur due to manual measurement.
• Colors may vary slightly between different monitors.

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What voltage range does this digital LED circuit tester support?

A: This circuit tester accurately measures voltages from 5V to 120V DC, covering a wide range of automotive and general electrical applications including cars, trucks, SUVs, motorcycles, and marine vehicles.

Q: Does the digital circuit tester require batteries to operate?

A: No, this tester does not require any external batteries. It draws power directly from the circuit being tested, making it ready to use right out of the box without any setup.

Q: Can I use this circuit tester for non-automotive applications?

A: Yes! While it's optimized for automotive diagnostics, its 5V–120V range also makes it suitable for home electrical systems, RVs, boats, and other general-purpose electrical testing where DC voltage is present within that range.