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⚡ Stay powered, stay precise — test like a pro with Klein Tools ET40!
The Klein Tools ET40 Digital AC/DC Voltage Tester offers professional-grade accuracy for residential electrical troubleshooting, testing AC voltages from 12 to 240 volts and DC voltages from 1.5 to 24 volts. Featuring bright LED indicators, DC polarity detection, and rugged drop resistance, it’s designed for durability and safety with CATIII 250V certification and double insulation. Auto power-off extends battery life, making it a reliable companion for electricians and DIY pros alike.












| ASIN | B07P45RB8S |
| ASIN | B07P45RB8S |
| Batteries | 2 AAA batteries required. (included) |
| Best Sellers Rank | #47,933 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #96 in Voltage Testers |
| Brand Name | KLEIN TOOLS |
| Color | Orange |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,641) |
| Customer reviews | 4.5 4.5 out of 5 stars (1,641) |
| 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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