---
product_id: 122902673
title: "ET310"
brand: "klein tools"
price: "C$6226"
currency: NIO
in_stock: null
reviews_count: 8
category: "Klein Tools"
url: https://www.desertcart.ni/products/122902673-et310
store_origin: NI
region: Nicaragua
---

# 90-120V AC compatibility Two-part transmitter & receiver system Visual & audible breaker identification ET310

**Brand:** klein tools
**Price:** C$6226
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Master your electrical domain with precision and safety—because guessing is so last decade.

## Quick Answers

- **What is this?** ET310 by klein tools
- **How much does it cost?** C$6226 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/122902673-et310)

## 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

- • **Dual-Mode Power Duo:** Transmitter plugs into outlets while receiver scans breakers for seamless, foolproof detection.
- • **Compact Docking Design:** Transmitter nests inside receiver for tidy storage and easy transport—never lose a piece again.
- • **Integrated GFCI Safety Check:** Test GFCI outlets on the spot—combine breaker finding and safety testing in one sleek tool.
- • **Pro-Grade Durability & Trust:** Klein Tools’ 160+ years of American craftsmanship ensures a rugged, reliable tool built to last.
- • **Pinpoint Accuracy, Zero Guesswork:** Locate the exact circuit breaker fast with precision signals—no more trial and error.

## Overview

The Klein Tools ET310 is a professional-grade AC circuit breaker finder featuring a two-part transmitter and receiver system that accurately identifies breakers on 90-120V circuits. It includes an integrated GFCI outlet tester for comprehensive wiring safety checks. Compact and durable, this battery-powered tool offers clear visual and audible signals, making electrical troubleshooting faster and more reliable for pros and serious DIYers alike.

## 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.

Review: Trusted Klein Tools Brand, Easy To Use - I started using circuit breaker finders about ten years ago. I was very happy to discover that there was such a thing. At the time, I bought the cheapest one I could find. It worked Ok, but still required some trial and error to find the circuit I needed to turn off. When I saw that Klein Tools made a circuit breaker finder, I thought I'd try it because I've always been impressed with the quality of Klein electrical tools. My neighbor is a Master Electrician and he uses many Klein brand tools. Compared to my old, cheap device, the Klein Tools instrument has better sensitivity and accuracy. The visual notification is plenty bright for dark rooms where the panel box can be found. This unit allows me to quickly and easily locate circuit breakers. I don't always find them on the first try, but it sure beats pure trial and error. I already had a cheap dedicated voltage tester, but the transmitter with this Klein set also detects voltage and proper wiring of outlets! Best of all, this set fit perfectly into the hard case I already had. Also, desertcart sells good hard cases that will fit this device well.
Review: Simple, Solid, and Well-Priced Breaker Finder - The ET310 looks compact and clean, easy to spot in my tool bag. Features are exactly what I need: it finds the right breaker quickly, and the built-in GFCI outlet tester means I don’t need a second tool. Build quality feels solid—nothing flimsy—and it worked reliably on the first try. It’s very simple to use, even if you’re not a pro; the lights and tone make it clear when you’ve got the right breaker. For the price, it’s a great value and an easy recommendation for homeowners and DIY jobs.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QNMCVWP |
| Best Sellers Rank | #652 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Circuit Testers |
| Brand | KLEIN TOOLS |
| Brand Name | KLEIN TOOLS |
| Color | Orange |
| Customer Reviews | 4.7 out of 5 stars 24,829 Reviews |
| Global Trade Identification Number | 00092644692406 |
| Included Components | Includes Transmitter, Receiver, user manual, and 9V battery for Receiver |
| Item Dimensions | 10.96 x 2.16 x 1.39 inches |
| Item Height | 1.39 inches |
| Item Type Name | Klein Tools ET310 AC Circuit Breaker Finder with Integrated GFCI Outlet Tester |
| Item Weight | 7.2 Ounces |
| Item dimensions L x W x H | 10.96 x 2.16 x 1.39 inches |
| Manufacturer | Klein Tools |
| Maximum Operating Voltage | 120 Volts |
| Measurement Type | Voltmeter and Ohmmeter |
| Minimum Operating Voltage | 90 Volts |
| Model | ET310 |
| Power Source | Battery Powered |
| Style | Circuit Breaker Finder |
| Style Name | Circuit Breaker Finder |
| UPC | 092644692406 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 60 Degrees Celsius |

## Product Details

- **Brand:** KLEIN TOOLS
- **Power Source:** Battery Powered
- **Style:** Circuit Breaker Finder
- **Color:** Orange
- **Item Weight:** 7.2 Ounces

## Images

![ET310 - Image 1](https://m.media-amazon.com/images/I/61pw8oA02AL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Why don’t they have one for high voltages?**
A: What do you mean by high voltage? If you’re looking for something above 277/480, you’re going to want to spend more than $50. Otherwise you’re going to get
Yourself killed

**Q: Is the switch made so it won't turn on accidentally in a tool box?**
A: The pushbutton to turn on the unit is surrounded by a raised plastic lip.  The button sits flush with this lip.  If something in your toolbox pushes right up against the button hard enough it could possibly turn on.  You might consider getting a small zippered pouch such as the Klein Tools 69401 to protect the tester and help keep it from being accidentally turned on.

**Q: Can It uses on breaker off?**
A: No

**Q: Will it work if outlet has no power?**
A: No it will not work - it has to have a current to pick up the signal at the breaker box.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Trusted Klein Tools Brand, Easy To Use
*by M***C on January 8, 2026*

I started using circuit breaker finders about ten years ago. I was very happy to discover that there was such a thing. At the time, I bought the cheapest one I could find. It worked Ok, but still required some trial and error to find the circuit I needed to turn off. When I saw that Klein Tools made a circuit breaker finder, I thought I'd try it because I've always been impressed with the quality of Klein electrical tools. My neighbor is a Master Electrician and he uses many Klein brand tools. Compared to my old, cheap device, the Klein Tools instrument has better sensitivity and accuracy. The visual notification is plenty bright for dark rooms where the panel box can be found. This unit allows me to quickly and easily locate circuit breakers. I don't always find them on the first try, but it sure beats pure trial and error. I already had a cheap dedicated voltage tester, but the transmitter with this Klein set also detects voltage and proper wiring of outlets! Best of all, this set fit perfectly into the hard case I already had. Also, Amazon sells good hard cases that will fit this device well.

### ⭐⭐⭐⭐⭐ Simple, Solid, and Well-Priced Breaker Finder
*by J***N on November 1, 2025*

The ET310 looks compact and clean, easy to spot in my tool bag. Features are exactly what I need: it finds the right breaker quickly, and the built-in GFCI outlet tester means I don’t need a second tool. Build quality feels solid—nothing flimsy—and it worked reliably on the first try. It’s very simple to use, even if you’re not a pro; the lights and tone make it clear when you’ve got the right breaker. For the price, it’s a great value and an easy recommendation for homeowners and DIY jobs.

### ⭐⭐⭐⭐⭐ Accurate
*by B***N on November 20, 2025*

Hands down one of the most useful tools I own. Finds circuits fast and accurately, even in tricky setups. Saves a ton of time on the job. Highly recommend for electricians. Solid and great quality.

## Frequently Bought Together

- Klein Tools ET310 AC Circuit Breaker Finder, Electric and Voltage Tester with Integrated GFCI Outlet Tester
- Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles
- Klein Tools 69411 Circuit Breaker Finder Accessory Kit, Circuit Breaker Leads and Adapters

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**Shop now:** [https://www.desertcart.ni/products/122902673-et310](https://www.desertcart.ni/products/122902673-et310)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-01-23*