Round LED Digital Voltmeter DC 4-100V – Car Motorcycle Boat RV

Round LED Digital DC Voltmeter — Real-Time Voltage Monitoring for Any 12V/24V System

Keep your vehicle's electrical system in check with this compact, easy-to-mount Mini Round LED Digital Voltmeter. Featuring a bright, scratch-resistant LED display and high-accuracy integrated circuitry, it delivers instant, dependable voltage readings across a wide DC 4V–100V range. Perfect for cars, motorcycles, boats, RVs, solar setups, and DIY electronic projects.

Made in Mainland China.

Key Features

• High-Precision Measurement: Built-in high-accuracy IC chip keeps voltage measurement error within ±0.1V, with real-time data refresh so you can detect abnormal voltage before it damages your electrical devices.
• Brilliant LED Display: High-luminance LED digital tube with a scratch-resistant PC panel — choose from 5 display colors: Red, Blue, Yellow, Green, or White. Clearly readable even under direct sunlight.
• Durable Flame-Retardant Housing: Premium fire-resistant ABS engineering plastic shell provides excellent heat resistance, impact resistance, and corrosion resistance — built to handle harsh under-hood and outdoor environments.
• Plug-and-Play Installation: Comes with a 22AWG pure copper connecting wire and pre-crimped PH2.0 terminal. No complex debugging needed — most users are up and running in minutes, even without electronics experience.
• Wide Compatibility: Supports DC 4V–100V, making it suitable for cars, motorcycles, electric vehicles, solar power systems, boats, RVs, and a wide range of DIY low-voltage projects.

Specifications

Applications

• Car & motorcycle battery voltage monitoring
• Boat, RV & electric vehicle electrical systems
• Solar power system voltage checks
• DIY electronics and low-voltage circuit testing

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: What vehicles and systems is this digital voltmeter compatible with?

A: This round LED voltmeter supports any DC 4V–100V power system, making it compatible with 12V and 24V cars, motorcycles, boats, RVs, electric vehicles, and solar power setups. It also works great for DIY electronics and low-voltage circuit projects.

Q: How difficult is it to install this voltmeter?

A: Installation is straightforward — the unit comes with a 22AWG pure copper connecting wire and a pre-crimped PH2.0 terminal, so no complex wiring or debugging is required. It fits a standard 28mm mounting hole (30mm outer diameter) and most users complete the installation within a few minutes.

Q: Can I read the display in bright sunlight or at night?

A: Yes! The high-luminance LED digital tube is clearly visible in direct sunlight and in low-light conditions. You can also choose from five display colors (Red, Blue, Yellow, Green, or White) to best suit your dashboard or panel setup.

Q: How accurate is the voltage reading?

A: The built-in high-accuracy integrated circuit chip keeps measurement error within ±0.1V and refreshes readings in real time, so you always have an up-to-date and reliable voltage reading.

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.