--- product_id: 145721931 title: "Voltage Tester, AC Voltage and DC Voltage Tester, No Batteries Needed Klein Tools ET45" brand: "klein tools" price: "€ 30.16" currency: EUR in_stock: true reviews_count: 13 category: "Klein Tools" url: https://www.desertcart.pt/products/145721931-voltage-tester-ac-voltage-and-dc-voltage-tester-no-batteries store_origin: PT region: Portugal --- # 24-240V AC range No batteries needed Built-in lead holder Voltage Tester, AC Voltage and DC Voltage Tester, No Batteries Needed Klein Tools ET45 **Brand:** klein tools **Price:** € 30.16 **Availability:** ✅ In Stock ## Summary > ⚡ Stay powered, stay precise — the tester that’s always ready when you are. ## Quick Answers - **What is this?** Voltage Tester, AC Voltage and DC Voltage Tester, No Batteries Needed Klein Tools ET45 by klein tools - **How much does it cost?** € 30.16 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/145721931-voltage-tester-ac-voltage-and-dc-voltage-tester-no-batteries) ## Best For - klein tools enthusiasts ## Why This Product - Trusted klein tools brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rugged Reliability:** Drop-tested to 9.9 feet with IP44 dust and water resistance—built to survive your busiest workdays. - • **Smart Lead Storage:** Innovative built-in test lead holder docks leads for tamper-resistant outlet testing or neat storage. - • **Compact & Clip-Ready:** Pocket-sized with a secure clip for effortless carry and instant access on the go. - • **Dual Voltage Mastery:** Accurately tests AC voltages from 24V to 240V and DC voltages from 32V to 330V across four precision levels. - • **Power Up Without Batteries:** Operates solely on applied voltage—never worry about dead batteries again. ## Overview The Klein Tools ET45 Voltage Tester is a compact, battery-free device designed for professional-grade AC/DC voltage testing from 24V to 330V. Featuring a built-in lead holder for tamper-resistant outlet testing and convenient storage, it combines rugged durability with pocket-ready portability. Trusted for quick, reliable diagnostics without the hassle of battery maintenance, it’s a must-have for electricians and DIY pros aiming to stay efficient and safe. ## Description Product Description Klein Tools ET45 is an Electronic Voltage Tester. Designed as a simple, easy to use tester to check, verify or troubleshoot common residential electrical wiring in electrical outlets, light fixtures, doorbells and more. This tester does not require batteries, and features a pocket clip for convenient carrying. Tests AC voltages from 24V to 240V AC at four useful levels. Tests DC voltages from 32V to 330V at four levels. Built-in test lead holder on back of tester holds the leads in one of two positions: one so that they are spaced correctly to test tamper-resistant US-style outlets and the other for convenient storage of the test leads. Test leads can be docked in the holder for convenient storage. Batteries not required; tester is powered by the applied voltage. Built to withstand a 9. 9-Foot (3 m) drop. Safety Rating: CATIII 350V, Class 2, Double insulation. Ingress protection IP44 dust and water resistant. Pocket clip secures tester to pocket for reliable everyday carrying. For more than 160 years Safety Warning Read, understand, and follow all instructions, cautions and warnings attached to and/or packed with all test and measurement devices before each use.Before each use, verify tester operation by measuring a known voltage.Never use the tester on a circuit with voltages that exceed the category based rating of this testerAlways adhere to local and national safety codes. Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.Usage of this tester in any way other than that specified by the manufacturer can impair safe operation, resulting in severe injury or death. Review: 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. Review: Great little tester - Why did you choose this product over others?: Fantastic product, use everyday, like how it’s pocket sized, just wish it did a continuity audible beep Functionality: Great for proving dead on a circuit when you haven’t got your tool bag to hand Value for money: Very good product for the price ## Features - Tests AC voltages from 24V to 240V AC at four useful levels - Tests DC Voltages from 32V to 330V At four levels - Built-in test lead holder on back of tester holds the leads in one of two positions: one so that they are spaced correctly to test tamper-resistant use-style outlets and the other for convenient storage of the test leads - Test leads can be docked in the holder for convenient storage - Batteries not required; tester is powered by the applied Voltage ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07NZS6DGS | | Best Sellers Rank | 240,241 in DIY & Tools ( See Top 100 in DIY & Tools ) 341 in Voltage Testers | | Brand | KLEIN TOOLS | | Colour | Orange | | Compatible Devices | Electrical circuits (24V to 330V) | | Country Of Origin | China | | Customer Reviews | 4.5 out of 5 stars 898 Reviews | | Global Trade Identification Number | 00092644691843 | | Included Components | AC/DC Voltage Tester: Tester | | Item Dimensions | 11.3 x 3 x 2.7 centimetres | | Item Length | 4.45 Inches | | Item Type Name | Voltage Tester, AC Voltage and DC Voltage Tester, No Batteries Needed | | Item Weight | 1.8 Ounces | | Item Width | 1.19 Inches | | Item dimensions L x W x H | 11.3 x 3 x 2.7 centimetres | | Item weight | 1.8 Ounces | | Manufacturer | Klein Tools | | Manufacturer Part Number | ET45 | | Maximum Operating Voltage | 330 Volts | | Measurement Type | Voltmeter | | Minimum Operating Voltage | 24 Volts (AC) | | Model Number | ET40 | | Power Source | Not Battery Powered | | Power source | Not Battery Powered | | Specification Met | CE | | Style | 24/240 V | | Style Name | 24/240 V | | UPC | 092644691843 | | Unit Count | 1.0 count | ## Product Details - **Brand:** KLEIN TOOLS - **Colour:** Orange - **Item weight:** 1.8 Ounces - **Power source:** Not Battery Powered - **Style:** 24/240 V ## Images ![Voltage Tester, AC Voltage and DC Voltage Tester, No Batteries Needed Klein Tools ET45 - Image 1](https://m.media-amazon.com/images/I/41m2zDMldtL.jpg) ## Questions & Answers **Q: Can I use this with a proving unit?** A: ET45 had a CATIII 350V rating so if your planning on using a 600V proving unit probably not. Try a known 230V power source. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Small and handy *by R***N on 23 July 2025* 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. ### ⭐⭐⭐⭐⭐ Great little tester *by J***N on 15 July 2025* Why did you choose this product over others?: Fantastic product, use everyday, like how it’s pocket sized, just wish it did a continuity audible beep Functionality: Great for proving dead on a circuit when you haven’t got your tool bag to hand Value for money: Very good product for the price ### ⭐⭐⭐⭐⭐ Mini backup tester *by T***G on 3 May 2024* This tester really is small ( I'd call it a pocket tester ) and that's the beauty of it - Easy to carry with you or good as a little backup tester as there's no batteries required with it - It's nothing fancy, just a large LED display and no audible tone, but it does the job - The probe shrouds ( Grey on mine ) are easily removable for socket outlet testing ( I will mention though that I trimmed the RED & BLACK probe insulation back a couple of mm and formed a bevel before the probe tips and, for me, this greatly improved it's userbility for socket testing - For the money you really can't go wrong with this little tester. ## Frequently Bought Together - Klein Tools ET45 Voltage Tester, AC / DC, and Low Voltage Electric Tester, No Batteries Needed - NSi Industries TES-2 Voltage Tester, 120 or 240 VAC, Neon - WGGE WG-015 Professional 8-inch Wire Stripper/wire crimping tool, Wire Cutter, Wire Crimper, Cable Stripper, Wiring Tools and Multi-Function Hand Tool. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/145721931-voltage-tester-ac-voltage-and-dc-voltage-tester-no-batteries](https://www.desertcart.pt/products/145721931-voltage-tester-ac-voltage-and-dc-voltage-tester-no-batteries) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-14*