---
product_id: 48801813
title: "Network Cable Tester LAN RJ45 RJ11 N21CL Cat 5 Ethernet Line Tool Internet Broadband Connection Speed Capability"
brand: "jx2"
price: "€ 7.76"
currency: EUR
in_stock: true
reviews_count: 13
url: https://www.desertcart.sk/products/48801813-network-cable-tester-lan-rj45-rj11-n21cl-cat-5-ethernet
store_origin: SK
region: Slovakia
---

# Fast/slow switch testing Portable with case RJ45/RJ11 compatibility Network Cable Tester LAN RJ45 RJ11 N21CL Cat 5 Ethernet Line Tool Internet Broadband Connection Speed Capability

**Brand:** jx2
**Price:** € 7.76
**Availability:** ✅ In Stock

## Summary

> 🔍 Test with Confidence: Your Network's Best Friend!

## Quick Answers

- **What is this?** Network Cable Tester LAN RJ45 RJ11 N21CL Cat 5 Ethernet Line Tool Internet Broadband Connection Speed Capability by jx2
- **How much does it cost?** € 7.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/48801813-network-cable-tester-lan-rj45-rj11-n21cl-cat-5-ethernet)

## Best For

- jx2 enthusiasts

## Why This Product

- Trusted jx2 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **On-the-Go Convenience:** Compact design with a protective case for easy transport.
- • **Seamless Connectivity:** Effortlessly tests LAN connections for optimal performance.
- • **User-Friendly Interface:** LED indicators provide instant feedback on cable status.
- • **Versatile Compatibility:** Works with RJ11, RJ12, and various Ethernet cables.
- • **Comprehensive Diagnostics:** Automatically identifies continuity, shorts, and crossed wires.

## Overview

The Network Cable Tester N21CL is an essential tool for IT professionals, designed to ensure seamless LAN connectivity. It automatically runs comprehensive tests for continuity, shorts, and crossed wires, while its user-friendly LED indicators provide instant feedback. Compatible with various cable types, this portable device comes with a protective carrying case, making it perfect for on-the-go diagnostics.

## Description

Network Cable Tester LAN RJ45 RJ11 N21CL Cat 5 Ethernet Line Tool Internet Broadband Connection Speed Capability

## Features

- For testing LAN (Local Area Networks)
- Automatically runs all tests for continuity, open, shorted and crossed wire pairs
- Slow and fast switch and LED indicator shows malfunctions
- Can be used on RJ11, RJ12, 10 Base T and token ring cables
- Portable - Very easy to carry, comes with protective carrying case

## Images

![Network Cable Tester LAN RJ45 RJ11 N21CL Cat 5 Ethernet Line Tool Internet Broadband Connection Speed Capability - Image 1](https://m.media-amazon.com/images/I/41oTqV64+yL.jpg)
![Network Cable Tester LAN RJ45 RJ11 N21CL Cat 5 Ethernet Line Tool Internet Broadband Connection Speed Capability - Image 2](https://m.media-amazon.com/images/I/41MlEUoOcTL.jpg)
![Network Cable Tester LAN RJ45 RJ11 N21CL Cat 5 Ethernet Line Tool Internet Broadband Connection Speed Capability - Image 3](https://m.media-amazon.com/images/I/418IfpFEeZL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    A no-brainer - just buy it!
  

*by A***N on Reviewed in the United Kingdom on 25 April 2015*

It is likely that the battery will cost you more than the cable tester. It is fantastic value. The same device is almost 4 times more expensive from a leading trade building supplies chain, not including delivery!We had fixed CAT-5 cabling installed in our house whilst it was being built in 1997 and have really reaped the benefits as wireless congestion has increased, allowing us to have gigabit Ethernet around our home. However, over the years there have been some problems: With a patch panel, wall sockets and a plethora of cables, getting connections to work became a bit hit and miss.With this tester it took under an hour to test and fix the entire network installation by pointing the finger of blame in precisely the right places.- Several poor connections on the back of the patch panel and back of the wall sockets were found, quickly fixed by reseating the wires with the IDC Insertion Tool- Several faulty patch cables identified and discarded- A faulty network switch port was identified having proven the cabling to be goodI used to use a Multimeter to test continuity of the fixed wiring but it is far more time consuming and does not allow end-to-end testing of fixed wiring plus patch cables. If this tester just saves you a few minutes it has already paid for itself.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Nifty little gadget
  

*by G***L on Reviewed in the United Kingdom on 15 January 2011*

The overall build quality is reflected in the price but that aside it does the job. If you are only going to use it at home then you can't go wrong with this product. Why pay big bucks for something you are only going to use maybe one or two times. I had a problem with my ethernet set up and this little gadget found it instantly. My home hard wired ethernet is up and running perfectly. Doesn't come with a battery so you'll need a PP3 Battery before you can use it.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Not a professional tool, but perfect for me
  

*by D***E on Reviewed in the United Kingdom on 7 August 2013*

This thing cost pennies.I had half a dozen or so cables that I needed to crimp, and locate their matching ends to sockets around the house. Using this very low cost tool, I had it done in a snap. It happily identified problems with my crimping - give me a break, it's nearly 20 years since I last crimped a cable - and in one case found a fault in the wiring of the faceplate in one of the rooms.Without this, I'd have been guessing or tearing my hair out.However, it's not really a tool for the professional. I used to be in a business which sold cable testing equipment for £2000 a pop - and that was in the late '80s when £2000 actually bought you something. If I were a professional cable installer, I'd want something far more robust than this.But for a domestic user, or perhaps a builder that occasionally installs Cat 5 cabling and wants to quickly check that it is basically wired up correctly, then this tool is fine.

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**Shop now:** [https://www.desertcart.sk/products/48801813-network-cable-tester-lan-rj45-rj11-n21cl-cat-5-ethernet](https://www.desertcart.sk/products/48801813-network-cable-tester-lan-rj45-rj11-n21cl-cat-5-ethernet)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-11*