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⚙️ Master your measurements with Klein’s pro-grade precision!
The Klein Tools MM420 Digital Multimeter is a robust, auto-ranging TRMS device capable of measuring up to 600V AC/DC voltage, 10A AC/DC current, and 50 MΩ resistance. Designed for professionals and serious DIYers, it features lead-alert safety LEDs, a backlit display for low-light visibility, and durable construction that withstands drops up to 2 meters. Complete with test leads, thermocouple, and batteries, it’s engineered for accuracy, safety, and convenience across residential, HVAC, and light industrial environments.

| ASIN | B0B57PFFYX |
| Best Sellers Rank | #34,901 in Home Improvement ( See Top 100 in Home Improvement ) #46 in Multi Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Colour | Black |
| Country of Origin | China |
| Customer Reviews | 4.7 out of 5 stars 573 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 Weight | 0.11 Pounds |
| 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 |
| Minimum Operating Voltage | 9 Volts |
| Model Number | MM420 |
| Part Number | MM420 |
| Power Source | Battery Powered |
| Power Source Type | Battery Powered |
| Specification Met | Cat Iii 600v Safety Rating |
| Style | Auto-Ranging |
| Style Name | Auto-Ranging |
| UPC | 092644693748 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 60 Degrees Celsius |
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