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⚙️ Master your measurements with Klein’s pro-grade precision!
The Klein Tools MM420 is a professional-grade digital multimeter featuring auto-ranging True RMS technology for precise AC/DC voltage (up to 600V), current, resistance, temperature, and more. Designed with safety in mind, it includes Lead-Alert LEDs and a durable build that withstands 2-meter drops. Its versatile functions and hands-free features make it an essential tool for electricians, HVAC pros, and DIY managers aiming for flawless diagnostics.












| ASIN | B0B57PFFYX |
| Best Sellers Rank | 81,498 in DIY & Tools ( See Top 100 in DIY & Tools ) 130 in Multi Testers |
| Brand | KLEIN TOOLS |
| Colour | Orange/Black |
| Compatible Devices | Test leads (included with the product) |
| Country Of Origin | USA |
| Global Trade Identification Number | 00092644693748 |
| Included Components | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp |
| Item Dimensions | 23.7 x 12.9 x 9.7 centimetres |
| Item Type Name | Digital Multimeter, TRMS Auto-Ranging, 600V, Temp |
| Item Weight | 0.11 Pounds |
| Item dimensions L x W x H | 23.7 x 12.9 x 9.7 centimetres |
| Item weight | 0.11 Pounds |
| Manufacturer | Klein Tools |
| Manufacturer Part Number | MM420 |
| Measurement Type | Multimeter |
| Minimum Operating Voltage | 9 Volts |
| Model Number | MM420 |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Product Warranty | 1 year manufacturer |
| Specification Met | Cat Iii 600v Safety Rating |
| Style | w/Lead Alert |
| Style Name | w/Lead Alert |
| UPC | 092644693748 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 1000 Degrees Celsius |
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