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

Price: $49.97
(as of Nov 14, 2025 22:44:54 UTC – Details)


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. Circuit Breaker Finder locates the correct breaker in a panel. Tester consists of two parts: a Transmitter and a Receiver. GFCI Outlet Tester integrated in receiver. Transmitter docks in the Receiver for convenient storage as a single item when tester is not is use. Transmitter incorporates a three-pin plug for connecting to North-American-style grounded electrical outlets. The transmitter may be connected to other electrical fixtures using optional accessories which are sold separately (Cat. No. 69411). Receiver powers off automatically after approximately three minutes of non-use to conserve battery life. Transmitter is powered by the circuit when connected to the electrical outlet or fixture. Low battery indicator. Easily accessible battery compartment. Uses one 9V battery in receiver only; Transmitter does not require a battery. Built to withstand a 6.6-Foot (2 m) drop. CAT II 120V safety rating. Measurement Category II is applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage MAINS installation. Includes Transmitter, Receiver, user manual, and 9V battery (for Receiver). 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.
Product Dimensions ‏ : ‎ 10.96 x 2.16 x 1.39 inches; 7.2 ounces
Item model number ‏ : ‎ ET310
Department ‏ : ‎ Unisex-Adult
Batteries ‏ : ‎ 1 9V batteries required. (included)
Date First Available ‏ : ‎ April 15, 2019
Manufacturer ‏ : ‎ Klein Tools
ASIN ‏ : ‎ B07QNMCVWP
Best Sellers Rank: #1,414 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #3 in Circuit Testers
Customer Reviews: 4.7 4.7 out of 5 stars 24,542 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
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