---
product_id: 587845916
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: "¥18302"
currency: JPY
in_stock: true
reviews_count: 1
category: "Klein Tools"
url: https://www.desertcart.jp/products/587845916-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v
store_origin: JP
region: Japan
---

# 600V AC/DC voltage range 10A AC/DC current capacity 50 MΩ resistance measurement 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:** ¥18302
**Availability:** ✅ In Stock

## Summary

> 🔧 Power Your Precision with Klein’s MM420 – The Multimeter That Means Business!

## 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?** ¥18302 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/587845916-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

- • **Instant, Accurate Readings:** True RMS technology delivers precise measurements on complex signals, so you never second-guess your data.
- • **All-in-One Precision Toolkit:** Auto-ranging TRMS multimeter with temperature, capacitance, frequency & diode testing for total diagnostic power.
- • **Trusted by Experts Nationwide:** Designed by electricians for electricians, backed by thousands of 5-star reviews and top rankings.
- • **Safety-First Lead-Alert System:** LED indicators ensure perfect test lead placement, minimizing errors and maximizing safety on every job.
- • **Pro-Grade Durability & Portability:** Includes rugged carrying case and CAT III/CAT IV safety-capped leads built for demanding fieldwork.

## Overview

The Klein Tools MM420 is a professional-grade auto-ranging TRMS digital multimeter designed for electricians and technicians. It measures up to 600V AC/DC voltage, 10A AC/DC current, and 50 MΩ resistance, plus temperature, capacitance, frequency, duty cycle, and diode tests. Featuring a lead-alert LED system for enhanced safety and accuracy, it comes complete with a carrying case, CAT III/CAT IV safety-capped test leads, thermocouple, and batteries—making it a reliable, all-in-one diagnostic tool trusted by professionals nationwide.

## 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. Klein Tools Test and Measurement product line was exclusively designed from the ground up by electricians for electricians. Years of field research, combined with extensive input from electricians across America, inspired the development of meters and electrical testers loaded with innovative, time-saving features.

Review: Automobile - This is very good product

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B57PFFYX |
| Best Sellers Rank | #6,354 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Multi Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Orange/Black |
| Colour | Orange/Black |
| Country Of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 4,494 Reviews |
| Global Trade Identification Number | 00092644693748 |
| Included Components | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp |
| Item Dimensions | 23.7 x 12.9 x 9.7 centimeters |
| Item Length | 6.41 Inches |
| Item Type Name | Building Material |
| Item Width | 1.78 Inches |
| Item dimensions L x W x H | 23.7 x 12.9 x 9.7 centimeters |
| Manufacturer | KLEIN TOOLS |
| Measurement Type | Multimeter |
| Min. Operating voltage | 9 Volts |
| Minimum Operating Voltage | 9 Volts |
| Model | MM420 |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Specification Met | Cat Iii 600v Safety Rating |
| Style | w/Lead Alert |
| Style Name | w/Lead Alert |
| UPC | 092644693748 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 1000 Degrees Celsius |

## Product Details

- **Brand:** KLEIN TOOLS
- **Colour:** Orange/Black
- **Item weight:** 413 g
- **Power source:** Corded Electric
- **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)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Automobile
*by T***U on 16 September 2025*

This is very good product

## 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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**Shop now:** [https://www.desertcart.jp/products/587845916-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v](https://www.desertcart.jp/products/587845916-klein-tools-mm420-digital-multimeter-auto-ranging-trms-multimeter-600v)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-01*