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⚡ Stay powered, stay precise — Klein Tools ET40 keeps you ahead of the current!
The Klein Tools ET40 Digital AC/DC Voltage Tester is a professional-grade, compact device designed for accurate voltage detection from 12 to 240 volts AC and 1.5 to 24 volts DC. Featuring bright LED indicators, DC polarity detection, and robust construction with drop resistance and IP4 dust/water protection, it’s optimized for residential electrical troubleshooting. Auto-off functionality conserves battery life, making it a reliable, durable tool trusted by professionals since 1857.












| ASIN | B07P45RB8S |
| ASIN | B07P45RB8S |
| Batteries | 2 AAA batteries required. (included) |
| Best Sellers Rank | #133,111 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #311 in Voltage Testers |
| Brand Name | KLEIN TOOLS |
| Color | Orange |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,633) |
| Customer reviews | 4.5 4.5 out of 5 stars (1,633) |
| Date First Available | 12 February 2019 |
| Department | Unisex Adult |
| Global Trade Identification Number | 00092644691836 |
| Included Components | No|Tester, User Manual, and 2 x AAA Batteries |
| Is Discontinued By Manufacturer | No |
| Item Dimensions | 13.3 x 3.9 x 2.8 centimeters |
| Item Length | 5.24 Inches |
| Item Type Name | Klein Tools ET40 Voltage Tester, AC Voltage, DC Voltage, and DC Polarity, Low Voltage Tester Includes Batteries |
| Item Weight | 2.3 Ounces |
| Item Width | 1.11 Inches |
| Item model number | ET40 |
| Manufacturer | KLEIN TOOLS |
| Manufacturer | KLEIN TOOLS |
| Maximum Operating Voltage | 240 Volts |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 1.5 Volts |
| Model | ET40 |
| Number of Items | 1 |
| Part Number | ET40 |
| Power Source | Battery Powered |
| Product Dimensions | 13.31 x 3.86 x 2.82 cm; 65.2 g |
| Specification Met | CE |
| Style Name | 12/240 V |
| UPC | 092644691836 |
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