---
product_id: 271144234
title: "40180 Tone Generator and Amplifier Probe Circuit Finder Kit,Black"
brand: "extech"
price: "A$296"
currency: AUD
in_stock: true
reviews_count: 5
category: "Extech"
url: https://www.desertcart.com.au/products/271144234-40180-tone-generator-and-amplifier-probe-circuit-finder-kit-black
store_origin: AU
region: Australia
---

# Non-contact audible wire detection RJ11 & RJ45 connectors + alligator clips Selectable continuous/variable tone 40180 Tone Generator and Amplifier Probe Circuit Finder Kit,Black

**Brand:** extech
**Price:** A$296
**Availability:** ✅ In Stock

## Summary

> 🎯 Trace it. Fix it. Own it.

## Quick Answers

- **What is this?** 40180 Tone Generator and Amplifier Probe Circuit Finder Kit,Black by extech
- **How much does it cost?** A$296 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/271144234-40180-tone-generator-and-amplifier-probe-circuit-finder-kit-black)

## Best For

- extech enthusiasts

## Why This Product

- Trusted extech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Tone Control Mastery:** Switch between continuous and variable tones to isolate circuits effortlessly.
- • **Compact & Ready-to-Go:** Lightweight 280g kit powered by included 9V battery—work anywhere, anytime.
- • **Universal Connectivity:** Includes RJ11, RJ45 connectors and alligator clips for versatile cable tracing.
- • **Pinpoint with Precision:** Non-contact probe audibly identifies wires & cables for fast troubleshooting.
- • **Continuity & Identification:** Test continuity and ring/tip wiring to ensure flawless connections.

## Overview

The Extech 40180 Tone Generator and Amplifier Probe Circuit Finder Kit is a professional-grade tool designed for quick and accurate wire tracing and circuit identification. Featuring non-contact audible detection, RJ11/RJ45 connectors plus alligator clips, and selectable tone modes, it streamlines troubleshooting for phone, network, and coax cables. Compact and battery-powered, it’s an essential companion for managers and technicians who demand efficiency and precision in their workflow.

## Description

Buy Extech 40180 Tone Generator and Amplifier Probe Circuit Finder Kit,Black online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: So I bought this to trace a faulty lead back to my ECU, The product looks very robust in the picture but turned out to be regular flimsy plastic. Getting the battery in the probe was a particular nightmare as the fitting is too tight and the leads too short and not having the dexterity of a concert pianist or surgeon I was lucky not to brake the thing before even using it. I followed what little instructions there are but after an hours worth of trying could not get the thing to trace a cable, it just kept ringing wherever it happened to be pointing, you could point this thing at a bucket of blancmange an it would ring indicating a cable. What really annoyed me was that I thought I'd purchased one of the better quality ones but the lesson here is that, just because it's yellow does not mean Dewalt quality. I don't know if I can send it back as I've tried using it but it certainly didn't do what it said on the tin.
Review: found two broken wires on a 2020 Western star within two minutes. in shop time, it would have been min 3 hours labor.

## Features

- Non-contact probe audibly identifies selected wire or cable
- Trace phone, computer network and coax cables
- Tone generator is terminated with RJ11 and RJ45 connectors plus alligator clips
- Selectable continuous or variable tone
- Continuity and ring/tip identification test

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00023RVNO |
| ASIN  | B00023RVNO |
| Batteries | 1 Product Specific batteries required. (included) |
| Batteries  | 1 Product Specific batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Best Sellers Rank | #129,202 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #172 in Circuit Testers |
| Color | Black |
| Customer Reviews | 4.2 4.2 out of 5 stars (237) |
| Customer reviews | 4.2 4.2 out of 5 stars (237) |
| Date First Available | 1 January 2024 |
| Date First Available  | 1 January 2024 |
| Included components | Alligator clips, RJ45 and RJ11 modular connectors, 9V battery, Case |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 280 g |
| Item model number | 40180 |
| Item model number  | 40180 |
| Manufacturer | Extech Instruments |
| Manufacturer  | Extech Instruments |
| Material | ABS |
| Measurement Accuracy | +/-0.5% |
| Number Of Pieces | 1 |
| Part number | 40180 |
| Power source type | Corded Electric |
| Product Dimensions | 22.86 x 5.84 x 2.54 cm; 280 g |
| Product Dimensions  | 22.86 x 5.84 x 2.54 cm; 280 g |
| Size | Heavy Duty Wire Tracer |
| Specification met | CE |
| Style | 40180 |
| Voltage | 9 Volts |
| tech_spec_battery_description_toys | 9V Battery |

## Product Details

- **Brand:** Extech
- **Colour:** Black
- **Item weight:** 0.28 Kilograms
- **Power source:** Corded Electric
- **Style:** 40180

## Images

![40180 Tone Generator and Amplifier Probe Circuit Finder Kit,Black - Image 1](https://m.media-amazon.com/images/I/511CFHWq73L.jpg)

## Questions & Answers

**Q: Do you have to use the transmitter or can it locate passive cables behind a wall without it?**
A: You can locate 60Hz lines behind a wall to some extent, without the transmitter:  The probe will make a louder 120Hz buzzing noise as it is moved closer to cables.

**Q: If I have both ends of a house wire exposed, how would I hook up to check if I have the correct wire?**
A: You connect the transmitter to a pair of wires in the room, either raw ends or in an RJ11 telephone jack.  Turn it on.  Turn on the probe and check that the toner is working.  Go go to NID, where all the house wiring starts.  The tone can be hear is you are near the wire, louder on the outside of the cable, very loud when actually touch the correct pair of wires.

**Q: Is it easy for a beginner to use? Does it easily hook up to the wire or do I need to cut into the plastic surrounding the wire?**
A: It's easy to connect and you don't need to cut into the insulator, but the problem I had with the tool is:  the signal is so sensitive that I wasn't able to  tell if the wire was cut, because all the wires I was testing were in a harness

**Q: How many feet will this work for?**
A: i was using it very successfully at over 70 feet.  The lines I was tracing were up and over in a building.  So i really do not know the exact distance.  but it worked great

## Customer Reviews

### ⭐⭐ Review
*by M***N on 8 August 2014*

So I bought this to trace a faulty lead back to my ECU, The product looks very robust in the picture but turned out to be regular flimsy plastic. Getting the battery in the probe was a particular nightmare as the fitting is too tight and the leads too short and not having the dexterity of a concert pianist or surgeon I was lucky not to brake the thing before even using it. I followed what little instructions there are but after an hours worth of trying could not get the thing to trace a cable, it just kept ringing wherever it happened to be pointing, you could point this thing at a bucket of blancmange an it would ring indicating a cable. What really annoyed me was that I thought I'd purchased one of the better quality ones but the lesson here is that, just because it's yellow does not mean Dewalt quality. I don't know if I can send it back as I've tried using it but it certainly didn't do what it said on the tin.

### ⭐⭐⭐⭐⭐ Review
*by K***N on 3 June 2022*

found two broken wires on a 2020 Western star within two minutes. in shop time, it would have been min 3 hours labor.

### ⭐⭐⭐⭐⭐ Review
*by F***O on 24 December 2025*

I’ve been an auto tech over 20 years and I don’t know how I ever got by without this tool.But first thank you AMAZON for the very quick delivery !! This device Is easy to use and hasn’t failed me once ,It saves time when pinpointing a wire issue.I Love it Used it many times now and it looks brand new

## Frequently Bought Together

- Extech 40180 Tone Generator and Amplifier Probe Circuit Finder Kit,Black, Heavy Duty Wire Tracer
- General Technologies Corp GTC CT6100 Fuse Socket Connector Kit , Yellow
- ES Electronic Specialties 142-5 Flexible Silicon Back Probe Pin, RED, BLACK

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-17*