Waterproof Digital Voltmeter DC 5-48V LED Battery Gauge

Waterproof Round Digital Voltmeter — DC 5–48V LED Battery Voltage Gauge

Keep a constant eye on your vehicle's battery health with this compact, waterproof round digital voltmeter. Featuring a bright 3-digit LED display in your choice of colour — Red, White, Blue, Green, or Orange — this gauge mounts cleanly into any 1-1/8" (36 mm) panel cutout and gives you an instant, accurate DC voltage readout from 5 V to 48 V. Made in Mainland China.

Why You'll Love It

• Wide Compatibility: Works with cars, motorcycles, boats, ATVs, UTVs, campers, caravans, travel trailers, and more — truly universal for DC 5–48V systems.
• Waterproof & Flame-Retardant Housing: Built from durable, eco-friendly black plastic that resists moisture and heat for long-lasting, reliable performance.
• Twist-and-Lock Installation: Slides into a 1-1/8" panel hole up to 0.25" thick; a nylon retaining nut locks it firmly in place in minutes — no special tools required.
• Bright LED Segments: The 3-bit LED digital tube is easy to read in all lighting conditions, so you always know whether your battery is fully charged or needs attention.
• Reverse Connection Protection: Built-in safeguard prevents wiring damage if connections are accidentally reversed.
• Selectable Display Colour: Choose from Red, White, Blue, Green, or Orange to match your vehicle's interior or instrument cluster.
• Mini & Lightweight: Compact 36 mm diameter footprint fits dashboards, panels, and custom builds without taking up valuable space.
• Multi-Purpose Voltage Monitoring: Great for monitoring storage-battery charge levels and can also be used for other DC voltage measurement applications.

Technical Specifications

What's in the Box

• 1 × Round Digital LED Voltmeter (colour as selected)
• 1 × Nylon retaining nut

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: What vehicles is this digital voltmeter compatible with?

A: This voltmeter is universally compatible with any vehicle or device running a DC 5–48 V electrical system, including cars, motorcycles, boats, ATVs, UTVs, campers, caravans, and travel trailers. As long as your system falls within the 5–48 V DC measurement range and 6–24 V working range, this gauge will work.

Q: How difficult is it to install the voltmeter?

A: Installation is straightforward. Simply drill or find an existing 1-1/8" (approx. 36 mm) hole in your dashboard or panel (up to 0.25" thick), slide the voltmeter in, and tighten the included nylon retaining nut from behind. Connect the anode and cathode wires to your DC circuit and it powers on immediately — no complex wiring or tools needed.

Q: Does the voltmeter protect against reverse wiring?

A: Yes. This voltmeter includes a built-in reverse connection protection function. If the wires are accidentally connected the wrong way, the circuit is safeguarded and the wiring will not be damaged.

Q: Can I choose the LED display colour?

A: Absolutely. This voltmeter is available in five LED display colours: Red, White, Blue, Green, and Orange. Simply select your preferred colour at the time of purchase to match your vehicle's interior or personal style.

Q: Is this voltmeter waterproof?

A: Yes. The housing is constructed from waterproof, flame-retardant eco-friendly plastic, making it suitable for use in exposed panel locations on boats, ATVs, motorcycles, and other vehicles where moisture may be present.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.