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⚡ Test with confidence, work with precision — Klein Tools ET40 lights the way!
The Klein Tools ET40 Digital AC/DC Voltage Tester is a compact, professional-grade device designed for accurate testing of AC voltages from 12 to 240 volts and DC voltages from 1.5 to 24 volts. Featuring bright LED indicators for voltage level and polarity, it offers rugged durability with drop resistance up to 3 meters and IP4 dust/water protection. Certified to CATIII 250V safety standards and equipped with an auto-off function, this tester is ideal for electricians and DIY pros seeking reliable, efficient voltage diagnostics in residential and light commercial settings.












| ASIN | B07P45RB8S |
| Best Sellers Rank | #127,443 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #299 in Voltage Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Orange |
| Colour | Orange |
| Customer Reviews | 4.5 out of 5 stars 1,626 Reviews |
| Global Trade Identification Number | 00092644691836 |
| Included Components | No|Tester, User Manual, and 2 x AAA Batteries |
| 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 dimensions L x W x H | 13.3 x 3.9 x 2.8 centimeters |
| Item weight | 2.3 Ounces |
| Manufacturer | KLEIN TOOLS |
| Maximum Operating Voltage | 240 Volts |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 1.5 Volts |
| Model | ET40 |
| Part Number | ET40 |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Specification Met | CE |
| Style | 12/240 V |
| Style Name | 12/240 V |
| UPC | 092644691836 |
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