JAMHER DC Voltmeter Gauge 4–100V 6-Pack (2 Red, 2 Green, 2 Blue) Waterproof LED, Low-Current

Compact waterproof DC voltmeters that display 4–100V with bright three-digit LED readouts in red, green, and blue.

These JAMHER round panel voltmeters are small, low-current meters designed to monitor DC battery and system voltage across vehicles and equipment. Each set contains six waterproof gauge heads—two in red, two in green, and two in blue—plus quick-connect terminals for simple wiring. The displays offer clear numeric voltage readings, reverse-polarity protection to prevent damage from incorrect wiring, and a compact form factor that fits into tight dash or panel cutouts.

How accurate and wide is the voltage measurement range?

Each meter reads DC voltages from 4V up to 100V using a three-digit LED display for straightforward monitoring. Values below 4V will not register, and inputs above 100V risk permanent damage, so observe the rating during installation and use.

• Measuring range: DC 4–100V
• Three-digit LED readout for precise values
• Not functional under 4V; avoid exceeding 100V
• Typical circuit load current: 5–6 mA (low power draw)

Can these gauges survive outdoor or wet conditions?

Yes—JAMHER built the housings to be waterproof and durable, suitable for exposed vehicle dashboards, marine panels, and other moist settings. The plastic enclosure and sealed display help keep moisture out, but make sure cable connections are also protected for reliable long-term performance.

• Waterproof design for wet environments
• Robust plastic housing for daily wear
• Suitable for boats, motorcycles, and outdoor equipment
• Store and operate within -40 to 50°C for best life

How easy is installation and what safety features are included?

Installation is straightforward: each meter arrives with 90 cm leads and quick-connection terminals so you can mount and wire them with minimal tools. They include reverse polarity protection so incorrect wiring won’t burn the unit, though a reversed connection will simply prevent a reading.

• Included 90 cm (35.4") wire leads and quick-connect terminals
• Compact round shape fits small panel cutouts
• Reverse-polarity protection prevents component damage
• Low quiescent current keeps battery drain minimal

Where are these voltmeters most useful?

These meters are versatile for many DC-powered systems where ongoing voltage visibility matters. They are commonly used in automotive dashboards, motorcycles, golf carts, marine craft, RVs, and test rigs to watch battery condition and electrical health without bulky instruments.

• Automobiles, motorcycles, and scooters
• Boats, yachts, and marine panels
• Caravans, trailers, and RV electrical systems
• Workshops and test equipment for quick checks

Who is this for: DIYers, mechanics, fleet managers, boat owners, and hobbyists who need a compact, waterproof digital voltmeter to keep track of DC system voltage. The six-piece pack with three display colors is ideal for monitoring multiple circuits at once or replacing several dashboard indicators simultaneously. Remember to observe the 4–100V range and protect wiring connections to ensure reliable, long-lasting operation.