Round DC Digital Voltage Meter DC 4V‑100V LED Display Voltmeter Panel Meter High Accuracy Voltage Tester For Car Motorcycle Battery Monitoring

Round DC Digital Voltmeter Panel Meter

📌 Product Overview

This round DC digital voltmeter is a panel‑mount voltage monitoring gauge, designed for DC voltage real‑time detection. It adopts circular 3‑digit LED digital tube display, supports multiple display color options, built‑in reverse‑polarity protection function, simple installation and wiring. Widely used for battery voltage monitoring on automobiles, motorcycles, RVs, solar power systems and various DIY power equipment.

📋 Product Specifications

Item	Parameter
Measuring Range	DC 4V‑100V
Power Supply Range	DC 4V‑100V
Minimum Startup Voltage	3.8V
Allowable Error	±1%
Input Impedance	>100K ohms
Operating Current	Red <15mA, Green <12mA, Blue <12mA
Refresh Rate	About 300ms per time
Display Mode	3‑digit circular LED digital tube
Display Color	Red, Green, Blue, White, Yellow
Wire Length	20cm
Outer Diameter	33.8mm
Mounting Hole Size	30mm diameter
Body Depth	18mm
Working Temperature	-10℃ ~ 65℃

✨ Key Features

✅ Circular panel‑mount design, compact and space‑saving ✅ Multiple LED display colors optional for different scene demands ✅ Built‑in reverse polarity protection, reverse connection will not burn out the device ✅ High measuring accuracy within ±1% error ✅ Simple installation, snap‑in mounting for 30mm round hole ✅ High input impedance, low power consumption ✅ Ultra‑thin mirror surface, clear digital reading

🔌 Wiring Instructions

1. Red wire connects to the positive pole of measured DC power supply.
2. Black wire connects to the negative pole of measured DC power supply.
3. Real‑time DC voltage value will be displayed after power‑on.

Important Note: Do not input voltage higher than 100V, over‑voltage will cause permanent hardware damage.

🛠 Application Scenarios

Car / motorcycle battery voltage monitoring, RV storage battery detection, solar power system, engineering machinery equipment, DC power supply cabinet, DIY electronic projects, battery equipment voltage real‑time monitoring.

⚠ Important Usage Notice

Kind reminder: If there are version differences or images have not been updated, please refer to the actual product. Thank you!

1. The maximum input voltage cannot exceed DC 100V.
2. Confirm positive and negative polarity before wiring, avoid long‑term over‑voltage input.
3. Suitable for 30mm diameter mounting hole, do not force installation for mismatched hole size.
4. Working environment should be within -10℃ ~ 65℃.