










⚡ Stay powered, stay protected — test like a pro with Klein Tools ET40!
The Klein Tools ET40 Digital AC/DC Voltage Tester is a compact, professional-grade device designed for precise voltage detection from 12 to 240 volts AC and 1.5 to 24 volts DC. Featuring bright LED indicators for voltage level and polarity, it offers rugged durability with drop resistance and IP4 dust/water protection. Its energy-saving auto-off function and CATIII 250V safety rating make it an essential, reliable tool for electricians and savvy homeowners alike.












| ASIN | B07P45RB8S |
| ASIN | B07P45RB8S |
| Batteries | 2 AAA batteries required. (included) |
| Best Sellers Rank | #153,553 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #358 in Voltage Testers |
| Brand Name | KLEIN TOOLS |
| Color | Orange |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,588) |
| Customer reviews | 4.5 4.5 out of 5 stars (1,588) |
| 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 |
| 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 |
| Unit Count | 1 Count |
J**S
This voltage tester was a must have for me. I feel more at ease putting my trust in this product than I do a voltage pen, therefore since I lost my previous tester I purchased this affordable one. Absolutely perfect for checking safe isolation and betteries. Very please with this handy pocket tester.
S**D
exactly what i need , fast easy and no batteries needed so i can leave it in the car in the winter
R**N
Small and compact, can easily have in a pocket or small pouch. And the addition of no batteries required means less maintenance, the low price also makes it very affordable to replace should it became damaged or faulty. However I doubt the latter as klein is know for quality tools.
G**.
Muy bien! Solo que los cables están muy cortos para medir y en las características menciona que no hay modo de reparación por alguna eventualidad. Es decir que son desechables. Pero aún así son de buena calidad!
L**G
Sometimes you don't want to bring out the multimeter just to test the voltage. This is a good alternative.
Trustpilot
3 weeks ago
1 week ago