MGI SpeedWare 2-in-1 Digital Voltmeter Ammeter — 12V Blue LED Gauge, 10A Current Readout

MGI SpeedWare 2-in-1 Digital Voltmeter Ammeter is a compact LED gauge that shows live 12V DC voltage and up to 10A current in a single round panel.

This compact instrument combines a bright blue LED readout for voltage and amperage into a single 1-1/8" round housing, built for installation in cars, trucks, boats, RVs, ATVs and custom vehicles. It reads system voltage and current simultaneously, fits standard dashboard holes, and connects with three wires—battery, ground and load. The unit is designed for easy fitment and everyday monitoring so you can quickly verify electrical system status at a glance.

How will this gauge help me monitor my vehicle’s electrical system?

The MGI SpeedWare gauge gives continuous numeric feedback on both voltage and current so you can spot abnormal readings quickly. Monitoring both values helps you detect low-voltage conditions or unexpected current draw before they become bigger problems.

• Simultaneous digital display of voltage and amperage for immediate insight
• 10 amp maximum current readout suitable for many accessories
• Blue LED digits remain readable in daylight and low-light conditions
• Compact round size fits standard 1-1/8" panel holes for simple retrofit

What vehicles and systems is this voltmeter ammeter compatible with?

It works with most 12V DC systems commonly found in cars, trucks, marine craft and recreational vehicles. The unit also supports 24V systems through wiring configurations but is intended for general-purpose monitoring rather than battery charging current measurement.

• Designed for 12V DC electrical systems; can be used in many 24V setups with proper wiring
• Common applications: cars, trucks, RVs, boats, ATVs, UTVs, motorbikes and campers
• Not meant for measuring dedicated battery charging current or high-amperage alternator loads
• Ideal for monitoring accessories like lights, fridges, audio amps and auxiliary circuits

How simple is installation and what wiring is required?

Installation is straightforward for anyone comfortable with basic vehicle wiring. The gauge mounts into a 1-1/8" round hole and uses three connections: battery positive, ground and the load/current sense lead.

• Panel cutout: 1-1/8" round—standard gauge-size mounting
• Wiring: connect battery positive, ground/earth, and the load/current input
• Mounting hardware included for quick dash or panel fitment
• Compact footprint avoids crowding other instruments or switches

What should I expect from the display, accuracy and limits?

The LED readout is bright blue for clear visibility and refreshes continuously to show live readings. The current readout is limited to a maximum of 10 amps; for high-current monitoring you should choose a dedicated high-amp meter.

• Blue LED digits for high contrast and easy reading day or night
• Real-time numeric updates for both voltage and current values
• Current measurement cap: 10 A maximum
• Not designed for precision lab measurements; intended for practical on-vehicle monitoring

Who is this for: The MGI SpeedWare 2-in-1 Digital Voltmeter Ammeter is aimed at DIY vehicle owners, marine hobbyists and installers who need a compact, easy-to-read on-panel monitor for 12V accessory circuits. It’s a practical choice for anyone who wants quick electrical status checks for lighting, fridge units, auxiliary accessories or general system health without installing multiple instruments. If you need high-precision metering or measurements above 10 amps, consider a dedicated instrument designed for those requirements.