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⚡ Test with confidence, work with pride.
The Klein Tools ET40 Digital Voltage Tester is a compact, durable device designed for professional-grade AC/DC voltage testing from 12-240V AC and 1.5-24V DC. Featuring bright LED indicators, DC polarity detection, and an auto-off function, it ensures precise, safe diagnostics on residential electrical systems. Built to withstand drops and resist dust and water, this tester embodies Klein’s 160+ years of trusted craftsmanship.












| ASIN | B07P45RB8S |
| Best Sellers Rank | #130,390 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #309 in Voltage Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Orange |
| Colour | Orange |
| Customer Reviews | 4.5 out of 5 stars 1,628 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 |
J**S
It is absolutely necessary and perfect.
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.
R**0
Good Klein quality
Good voltage safety tool.
R**J
beau produit
lecteur facile d'utilisation et très bien fait
J**Z
Buenísimo.
¿Quieres saber si hay voltaje el tu circuito? Este es el probador indicado. Tienes las tres "B", bueno, bonito y barato.
R**N
Small and handy
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.
Trustpilot
1 month ago
1 day ago