Name: Klein Tools ET40 Digital AC/DC Voltage Tester, 12-240V AC, 1.5-24V DC, LED Illumination, DC Polarity, Auto Off, CATIII 250V-Class 2- Double Insulation
Brand: Klein Tools
SKU: 281802038
Price: 284.47 HKD
Availability: InStock
Rating: 5 (5 reviews)

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

⚡ Test Smarter, Work Safer — The Klein ET40 Means Business

RUGGED DURABILITY - Engineered to survive 3-meter drops and rated IP4 for dust and water resistance—built for the on-the-go professional.
SMART LED ILLUMINATION - Bright LEDs instantly reveal voltage presence and polarity, ensuring quick, confident diagnostics even in low light.
PRECISION VOLTAGE RANGE - Accurately tests AC voltages from 12V to 240V and DC voltages from 1.5V to 24V, covering all common residential needs.
ENERGY EFFICIENT AUTO OFF - Automatically powers down after 2 minutes of inactivity to extend battery life, so it’s ready when you are.
CERTIFIED SAFETY STANDARDS - CATIII 250V, Class 2 double insulation ensures maximum protection on the jobsite, giving you peace of mind.

The Klein Tools ET40 Digital Voltage Tester is a compact, professional-grade device designed for precise AC/DC voltage measurement 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. Certified to CATIII 250V safety standards and equipped with an auto-off function, this tester is an essential tool for electricians and home pros seeking reliable, efficient voltage diagnostics.

Specifications

ASIN	B07P45RB8S
Best Sellers Rank	#125,547 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #294 in Voltage Testers
Brand	KLEIN TOOLS
Brand Name	KLEIN TOOLS
Color	Orange
Colour	Orange
Customer Reviews	4.5 out of 5 stars 1,622 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

Reviews

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.

7.07.2023

R**0

Good Klein quality

Good voltage safety tool.

9.08.2025

R**J

beau produit

lecteur facile d'utilisation et très bien fait

24.12.2025

J**Z

Buenísimo.

¿Quieres saber si hay voltaje el tu circuito? Este es el probador indicado. Tienes las tres "B", bueno, bonito y barato.

6.02.2023

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.

23.07.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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HK$284

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago