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⚡ Master every measurement with confidence and style!
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, and resistance measurements. Equipped with advanced safety features like Lead-Alert LEDs and CAT III/CAT IV rated test leads, it ensures reliable and secure operation. Its versatile functionality includes temperature, capacitance, frequency, and diode testing, all housed in a rugged, drop-resistant design with user-friendly conveniences such as a backlit display and hands-free accessories—ideal for millennial professionals demanding accuracy and durability on the job.












| ASIN | B0B57PFFYX |
| Best Sellers Rank | 170,966 in DIY & Tools ( See Top 100 in DIY & Tools ) 312 in Multi Testers |
| Brand | KLEIN TOOLS |
| Colour | Orange/Black |
| Compatible Devices | Test leads (included with the product) |
| Customer Reviews | 4.7 4.7 out of 5 stars (740) |
| 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 | 0.91 Pounds |
| Manufacturer | Klein Tools |
| Manufacturer Part Number | MM420 |
| Measurement Type | Multimeter |
| Minimum Operating Voltage | 9 Volts |
| Model Number | MM420 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Power Source | Battery Powered |
| Product Warranty | 1 year manufacturer |
| Specification Met | Cat Iii 600v Safety Rating |
| Style Name | w/Lead Alert |
| UPC | 092644693748 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 1000 Degrees Celsius |
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