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⚡ Test with confidence, work with pride — Klein Tools ET40 keeps you powered up and protected.
The Klein Tools ET40 Digital AC/DC Voltage Tester is a compact, professional-grade device designed for precise residential voltage testing from 12 to 240V AC and 1.5 to 24V DC. Featuring bright LED indicators for voltage level and polarity, rugged drop resistance, and automatic power-off for battery conservation, it meets CATIII 250V safety standards with double insulation and IP4 dust/water resistance. Trusted by professionals for over 160 years, this tester combines reliability, durability, and ease of use in a pocket-sized tool.












| ASIN | B07P45RB8S |
| Best Sellers Rank | #131,646 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 1,631 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 |
| Number of Items | 1 |
| 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