---
product_id: 4150795
title: "12 Volt Digital Voltmeter, DROK 0.56\" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount"
brand: "drok"
price: "63607₫"
currency: VND
in_stock: false
reviews_count: 7
url: https://www.desertcart.vn/products/4150795-12-volt-digital-voltmeter-drok-0-56-dc-3-30v
store_origin: VN
region: Vietnam
---

# 0.56" bright green LED 3-30V DC range Reversed polarity protection 12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount

**Brand:** drok
**Price:** 63607₫
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Stay powered and in control with DROK’s sleek digital voltmeter!

## Quick Answers

- **What is this?** 12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount by drok
- **How much does it cost?** 63607₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/4150795-12-volt-digital-voltmeter-drok-0-56-dc-3-30v)

## Best For

- drok enthusiasts

## Why This Product

- Trusted drok brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable plastic casing guards against impact damage
- • **User-Safe Design:** Reversed connection protection means zero risk of burnout
- • **Versatile Application:** Ideal for solar, automotive, and motor battery checks
- • **Effortless Installation:** Two-wire setup—just red to positive, black to negative
- • **Precision Voltage Monitoring:** Auto decimal adjustment for ultra-accurate readings

## Overview

The DROK 12V Digital Voltmeter offers precise DC voltage measurement from 3 to 30 volts with an auto-adjusting decimal point and a bright 0.56" green LED display. Its simple two-wire connection and reversed polarity protection ensure safe, hassle-free installation. Encased in a robust plastic shell, this voltmeter is perfect for monitoring batteries in solar setups, cars, trailers, and motors, delivering reliable performance and durability.

## Description

Technical Parameters: Dimension: 48×29×22mm Cutting size: 46×27mm Measuring voltage range: DC 3-30V Maximum input: DC 30V (if the input voltage is higher than DC30V, the voltmeter will be burnt) Minimum input: DC 3V (if the input voltage is lower than DC 3V, the value will be inaccurate or not displayed) Measurement accuracy: Less than 10V, accurate to 0.01V; More than 10V, accurate to 0.1V (allowable tolerance: 1% +/- 1 word) Display: 3 digit 0.56'' LED digital tube Font Color: Green Refresh rate: about 200mS No need power supply Consuming current: less than 20mA (generally 5-15mA) Operating temperature: -10°c-65°c Wire length: 20cm Reverse connection protection: YES Method of wiring: Red wire: Positive Black wire: Negative Note: Please don't use this meter in 24V battery because when the battery is full-charged, its voltage will be about 30V (the max input volt for this meter), and we don't suggest you use it in max volt of 30V. Package Includes: 1× 0.56'' Voltmeter

## Features

- High accuracy: DROK digital voltmeter measuring range is DC 3-30V, its decimal point will automatically move, and it also has a tiny potentiometer to do finer adjustments.
- Easy to connect wires: the voltage tester gauge only has two wires, the red connects to positive and the black connects to negative.
- Safe to use: our volt detector is designed with reversed connection protection, it will NOT be burnt even when connected reversely, but the screen display nothing.
- Special Design: the voltage mintoring meter is designed with bright LED display, and it is well Made, the strong plastic case prevents it from easily damaged by outer force.
- Application: It is perfect to monitor the condition of the battery, especially for solar projects, you can use it on your car, trailer, motor, etc. Please don't use this meter in 24V battery because when the battery is full-charged, its voltage will be about 30V.

## Product Details

- **Brand:** DROK
- **Power Source:** Solar,battery Powered
- **Style:** Modern, Compact
- **Color:** Green,Black
- **Item Weight:** 4.32 ounces

## Images

![12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount - Image 1](https://m.media-amazon.com/images/I/61vPx3YIHLL.jpg)
![12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount - Image 2](https://m.media-amazon.com/images/I/614JDKqQQPL.jpg)
![12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount - Image 3](https://m.media-amazon.com/images/I/61XkFjhvRYL.jpg)
![12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount - Image 4](https://m.media-amazon.com/images/I/611jlzcZhGL.jpg)
![12 Volt Digital Voltmeter, DROK 0.56" DC 3-30V 12v Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter Detector for Solar Battery Monitor Checker Car Motor Panel Mount - Image 5](https://m.media-amazon.com/images/I/51bjsW3rW9L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ EXCEEDED EXPECTATIONS
*by S***R on April 13, 2015*

QUITE AN ITEM. Threw it onto the 12vt accessory output of my home generator and it checked within spec with my Fluke 8060 True RMS Digital Meter. It's package is complimentary as well as versatile. Brightness was VERY vivid outside on a clear day. It would be easy to view through a door or window at a distance. I'd imagine you could silicone the back for moisture proofing but the bezel might still be vulnerable. BEWARE of the conductivity of silicone until it's COMPLETELY dry if you go that route. Response time is immediate in my opinion. Using an 'ole FET meter I only picked up 8mA at 12vt which is considerably lower (better) than it's listed rating. I'd probably have to re-check the math but I'm curious if anyone else found out the same. Even that low I'd still put a switch inline on an idle battery of small capacity. Be an interesting test to put across a UPS backup battery and watch for any significant change. Ifs a great addition to my arsenal of goods and much smaller to pack than any meter. One major application might be a direct hookup to a car battery upon startup to check the condition of the battery indicated by the amount of voltage drop. Gets an "A" in my book.

### ⭐⭐⭐⭐⭐ Great modification for a tent trailer while on 12V battery power!
*by S***T on May 6, 2014*

I bought this for install in my tent trailer so monitor battery power when we camp without electrical hookups. I installed it right inside the front door and tapped into the 12V power wire to the porch light switch. I installed a momentary switch from Radio Shack between the power wire and the voltmeter, and then ran the ground from the voltmeter to the trailer frame. It works great, looks awesome, and now allows me to instantly check battery levels without crawling under the front bunk with a portable meter, removing the battery cover, banging my head on the bunk once or twice, and trying to muffle curse words so my kids don't hear me. Excellent product that works great!LATE EDIT :So far it's worked beautifully through several camping trips. Being able to monitor the battery level while staying inside is awesome and tracking how fast my 100w Renogy solar panel (also a HIGHLY recommended Amazon purchase!) recharges the battery through the day is great. I found on a popup trailer forum that many voltmeters such as this have an adjustment dial in the back. This read just a little bit high compared to my handheld unit at the battery. I removed it, adjusted the tiny set screw on the back, and now it's absolutely perfect. Highly recommend this product!

### ⭐⭐⭐⭐ Friends
*by P***A on March 21, 2025*

I was happy to have been in her life and continue to.

## Frequently Bought Together

- DROK 0.56 Inch DC 3-30V Digital Voltmeter Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter for Solar Battery Monitor Car Motor Panel Mount
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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-18*