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⚡ Test Smarter, Work Safer — The Voltage Tester Pros Trust!
The Klein Tools ET40 Digital AC/DC Voltage Tester is a compact, rugged device designed for professional-grade residential electrical diagnostics. It accurately measures AC voltages from 12 to 240 volts and DC voltages from 1.5 to 24 volts, with clear LED indicators and polarity detection. Built to endure drops up to 3 meters and rated CATIII 250V with double insulation, it ensures safety and durability on the job. Auto power-off extends battery life, making it a reliable tool for electricians and DIY pros alike.












| ASIN | B07P45RB8S |
| ASIN | B07P45RB8S |
| Batteries | 2 AAA batteries required. (included) |
| Best Sellers Rank | #67,197 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #143 in Voltage Testers |
| Brand Name | KLEIN TOOLS |
| Color | Orange |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,645) |
| Customer reviews | 4.5 4.5 out of 5 stars (1,645) |
| 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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