Search  for anything...

Klein Tools ET310 AC Circuit Breaker Finder, Electric Tester and Voltage Tester with Integrated GFCI Outlet Tester

  • Based on 22,943 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $8.33 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Nov 23
Order within 14 hours and 23 minutes
Available payment plans shown during checkout

Style: Circuit Breaker Finder


Features

  • ACCURATE CIRCUIT BREAKER IDENTIFICATION: Quickly locate the correct breaker with precision using our circuit breaker finder, ensuring efficient electrical troubleshooting
  • TWO-PART SYSTEM: Consists of a Transmitter connected to the outlet/fixture and a Receiver to scan the panel, allowing for easy and accurate breaker identification
  • CLEAR INDICATIONS: The Receiver provides visual and audible cues when the correct breaker is found, ensuring a hassle-free locating process
  • WIDE COMPATIBILITY: Operates on 90-120V AC circuits, making it suitable for a variety of electrical systems and installations
  • BUILT-IN GFCI TESTER: The Transmitter includes a GFCI outlet tester, enabling you to inspect wiring conditions and test GFCI devices for added safety
  • CONVENIENT STORAGE: The Transmitter docks in the Receiver, offering a compact storage solution, keeping the components together when not in use
  • UNIVERSAL CONNECTIVITY: The Transmitter features a three-pin plug for easy connection to North-American-style grounded electrical outlets, ensuring seamless compatibility

Description

The Klein Tools ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester is a digital circuit breaker finder used to locate the correct circuit breaker in a panel to which an electrical outlet or fixture is connected. The Transmitter is connected to the electrical outlet or fixture in the circuit while the receiver is used to scan the breakers in the circuit panel. The Transmitter also features a GFCI outlet tester. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

Brand: Klein Tools


Power Source: Corded Electric


Style: Circuit Breaker Finder


Color: Circuit Breaker Finder


Item Weight: 7.2 Ounces


Brand: ‎Klein Tools


Power Source: ‎Corded Electric


Style: ‎Circuit Breaker Finder


Color: ‎Circuit Breaker Finder


Item Weight: ‎7.2 Ounces


Item dimensions L x W x H: ‎10.96 x 2.16 x 1.39 inches


Min. Operating Voltage: ‎90 Volts


Measurement Type: ‎Voltmeter


Maximum Operating Voltage: ‎120 Volts


UPC: ‎092644692406


Manufacturer: ‎Klein Tools


Global Trade Identification Number: ‎06


Part Number: ‎ET310


Item Weight: ‎7.2 ounces


Product Dimensions: ‎10.96 x 2.16 x 1.39 inches


Country of Origin: ‎China


Item model number: ‎ET310


Batteries: ‎1 9V batteries required. (included)


Material: ‎PC & PC-ABS housing and electronic components


Pattern: ‎Breaker Kit


Voltage: ‎120 Volts


Item Package Quantity: ‎1


Special Features: ‎Transmitter docks in Receiver Transmitter integrated GFCI outlet tester in receiver


Included Components: ‎Includes Transmitter, Receiver, user manual, and 9V battery for Receiver


Batteries Included?: ‎Yes


Batteries Required?: ‎No


Date First Available: April 15, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Easy to use, Works great!
Style: Circuit Breaker Finder
This has been one of the best tools I have ever bought. We bought an older home and I have been fixing or replacing receptacles and lights. It has worked on every item I had to fix. Highly recommended.
Reviewed in the United States on November 13, 2024 by Russ

  • Valuable Tool for DIY Homeowner
Style: Circuit Breaker Finder
I ordered this tester because it seemed like something that I should have in my "tool arsenal". I tried it as soon as I got it so that I knew that it worked and so that I would know how to use it when I needed it. Circuit Breaker Finder - Worked like a charm! I plugged the "sending unit" into an outlet and then headed for the breaker panel. Using the tester I followed the directions and slowly passed it over all of the breakers once and then repeated it. As you get close to the right breaker - it will start to chirp a bit and when you are on it, you get the tone and the red light and the flashing green - can't miss it! I then flipped that breaker and went back to the outlet I was testing and it was the correct breaker. Sending Unit/Outlet Tester - This is handy in that it shows you if the outlet is wired property (and it was) and I like the GFCI tester function. I tested several of the outlets in my kitchen that should be on a GFCI circuit and when tested, did trip the GFCI outlet that was controlling them. Everything works, it was easy to use, and it makes testing and working on your home/farm wiring really easy. 5 Stars and I would buy it again for sure. ... show more
Reviewed in the United States on November 2, 2024 by TreeFarmer

  • This is a must have tool
Style: Circuit Breaker Finder
Great value. This just works. Saves lots of time tracing a circuit you need to shut off with an unmarked circuit breaker panel.
Reviewed in the United States on November 17, 2024 by CTmrGene

  • Accurate Circuit Breaker Finder, Essential Tool
Style: Circuit Breaker Finder
The circuit breaker finder works perfectly—accurate and easy to use. It quickly identifies breakers, saving time and effort. A must-have tool for any electrical troubleshooting.
Reviewed in the United States on August 8, 2024 by Melissa Menchaca

  • Great for tracking your breakers
Style: Circuit Breaker Finder
I encountered a problem with questionable breaker, so I purchased this tool. I tested it and found a couple of breakers had been mislabeled. I also found out that the breaker I had questions about (unfortuantely) is good while the line to 4 outlets is bad. I purchased another Klein tool that checks if a breaker is functioning okay, and it showed that the one I was concerned with was okay. This tool is worth having if you want to work on an electrical outlet on one side of your home and you need to find the associated breaker on the other side of the home, this is the tool for you. Unfortunately, it doesn't work with light switches. ... show more
Reviewed in the United States on July 22, 2024 by Ronald Gross

  • No more mislabeled Breakers!
Style: Circuit Breaker Finder
Works wonderfully! Works best if you are comfortable enough taking the cover off the panel, so you can get close to the wires coming in.
Reviewed in the United States on November 16, 2024 by Ryan K.

  • It’s very good finding the correct breaker
Style: Circuit Breaker Finder
This tool saved me from having to run in and out the house checking each breaker and what the breaker is for. Too bad you can’t plug it into your 240V receptacle to check those breakers as well but for what it is this tool is very useful and fairly priced.
Reviewed in the United States on October 5, 2024 by Stoyan Platchkov

  • you get it quick
Style: Circuit Breaker Finder
This product is wonderful , saves a ton of time . We had a huge building we were trying to find what breaker ran what . This cut out lots of walking back and forth and loads of time ! Wish I would've had this years ago !!
Reviewed in the United States on November 2, 2024 by Kenny Ray

Can't find a product?

Find it on Amazon first, then paste the link below.