---
product_id: 495852064
title: "Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black"
brand: "klein tools"
price: "868 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Klein Tools"
url: https://www.desertcart.pl/products/495852064-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v
store_origin: PL
region: Poland
---

# 600V AC/DC voltage range True RMS for precise current & voltage CAT III/IV safety rated with Lead-Alert Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black

**Brand:** klein tools
**Price:** 868 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Your Precision, Own the Job!

## Quick Answers

- **What is this?** Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black by klein tools
- **How much does it cost?** 868 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/495852064-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v)

## Best For

- klein tools enthusiasts

## Why This Product

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

## Key Features

- • **Built for the Field:** Rugged design withstands 2-meter drops and features hands-free options like kickstand and magnetic hanger for on-the-go pros.
- • **Safety First, Always:** Lead-Alert LEDs ensure correct test lead placement, minimizing errors and maximizing your peace of mind.
- • **Precision Meets Power:** Auto-ranging TRMS tech delivers ultra-accurate voltage, current, and resistance readings every time.
- • **All-in-One Versatility:** Measures voltage, current, resistance, temperature, capacitance, frequency, duty cycle, and diode tests—your ultimate diagnostic toolkit.
- • **Visibility in Any Light:** Backlit LCD display guarantees clear, easy-to-read measurements even in dim or confined spaces.

## Overview

The Klein Tools MM420 is a professional-grade auto-ranging TRMS digital multimeter designed for accurate measurement of AC/DC voltage up to 600V, current up to 10A, and resistance up to 50 MΩ. Featuring advanced safety with Lead-Alert technology, a rugged drop-resistant build, and versatile functions including temperature and capacitance testing, it’s engineered for demanding residential, commercial, and light industrial environments.

## Description

Product Description Klein Tools MM420 Multimeter is an auto-ranging, true root mean square (TRMS) multimeter that measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity Safety Warning Do not use the meter during electrical storms or in wet weather, and do not use the meter or test leads if they appear to be damaged.

Review: Does not come with carry case - Multimeter is good and so are its functions. However it does not come with a carry case as stated. False advertising
Review: Inadequate - Bought for my husband. But not impressed. He found inadequate.

## Features

- COMPLETE PACKAGE: Includes carrying case, test leads with CAT III/CAT IV safety caps, thermocouple, instructions, and 2 x AAA batteries
- VERSATILE FUNCTIONALITY: Measures AC/DC voltage up to 600V, 10A AC/DC current, 50MΩ resistance; additional features include continuity, temperature, capacitance, frequency/duty cycle and diode test
- LEAD-ALERT PROTECTION: LEDs on the meter illuminate to indicate proper test lead placement, enhancing accuracy and safety during measurements
- BACKLIT DISPLAY: LCD shows clear readings in low-light conditions for enhanced visibility
- ACCURATE MEASUREMENTS: Auto-ranging and True Root Mean Squared (TRMS) technology provides precise and accurate measurements
- CONVENIENT FEATURES: Test lead holders on the back of the meter, kickstand and optional magnetic hanger (Cat. Nos. 69445 or 69417) for hands-free operation
- DURABLE CONSTRUCTION: Built to withstand a 6.6-Foot (2 m) drop, ideal for use in basic and controlled electromagnetic environments such as residential, business, HVAC and light-industrial locations

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B57PFFYX |
| Batteries | 2 AAA batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | 61,998 in DIY & Tools ( See Top 100 in DIY & Tools ) 130 in Multi Testers |
| Colour | Orange/Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (746) |
| Date First Available | 7 Dec. 2022 |
| Display style | LCD |
| Included components | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp |
| Item Package Quantity | 1 |
| Item Weight | 50 g |
| Item model number | MM420 |
| Manufacturer | Klein Tools |
| Material | Blend |
| Measurement Accuracy | 600V AC/DC |
| Part number | MM420 |
| Pattern | Multimeter |
| Power source type | Battery Powered |
| Product Dimensions | 23.7 x 12.9 x 9.7 cm; 50 g |
| Size | One Size |
| Specification met | Cat Iii 600v Safety Rating |
| Style | w/Lead Alert |

## Product Details

- **Brand:** KLEIN TOOLS
- **Colour:** Orange/Black
- **Item dimensions L x W x H:** 23.7 x 12.9 x 9.7 centimetres
- **Power source:** Battery Powered
- **Style:** w/Lead Alert

## Images

![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black - Image 1](https://m.media-amazon.com/images/I/51O0EAYj9aL.jpg)
![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black - Image 2](https://m.media-amazon.com/images/I/61G61oMpJeL.jpg)
![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black - Image 3](https://m.media-amazon.com/images/I/61x0nOpxbsL.jpg)
![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black - Image 4](https://m.media-amazon.com/images/I/51FLeGC6O9L.jpg)
![Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance,Orange/Black - Image 5](https://m.media-amazon.com/images/I/61JV+XD63SL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐ Does not come with carry case
*by V***1 on 17 May 2025*

Multimeter is good and so are its functions. However it does not come with a carry case as stated. False advertising

### ⭐ Inadequate
*by H***V on 18 October 2025*

Bought for my husband. But not impressed. He found inadequate.

### ⭐⭐⭐⭐⭐ Review
*by M***E on 5 January 2026*

Does exactly what I bought it for

## Frequently Bought Together

- Klein Tools MM420 Digital Multimeter, Auto-Ranging TRMS Multimeter, 600V AC/DC Voltage, 10A AC/DC Current, 50 MOhms Resistance
- WERJIA Hard Carrying Case for Klein Tools MM420/MM325/MM720/MM700/ET600/MM450 Digital Multimeter
- Klein Tools 69417 Rare-Earth Magnetic Hanger, with Strap

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---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-16*