RJ45 Cable Tester

If you’re setting up or fixing a network, this little tester can save you a lot of frustration. It’s designed to quickly check both Ethernet (RJ45) and phone (RJ11) cables so you’ll know right away if a cable is wired correctly or if there’s a problem.

The unit comes in two pieces — a main “master” tester and a smaller remote that detaches, which makes it easy to test long cables by yourself. Just plug each end of the cable into the tester, flip the switch, and the row of LEDs will light up in sequence to show you the wiring order. That way you can spot bad connections, crossed wires, or broken pairs in seconds.

It’s lightweight, simple to use, and small enough to toss in your tool bag. All it takes is a standard 9V battery, and you’re good to go.

This is the kind of tool every installer, IT tech, or even DIY homeowner should have on hand. Whether you’re running cables through an office, checking your home network, or just making sure your patch cords are good before plugging them in, this tester will help you avoid guesswork and wasted time.

Key Features:

• Supports RJ45 & RJ11 cables – Test standard Ethernet (8P8C) and telephone (6P4C/6P2C) cables.
• Master & Remote unit – Detachable remote module allows one-person testing of long cable runs.
• LED Indicators – Sequential LED lights show wiring order, making it easy to spot open, short, cross, or miswired pairs.
• Simple operation – Just plug in both ends of the cable and switch on for a quick diagnostic.
• Compact & portable – Lightweight, pocket-sized design (approx. 4.2" x 4.0" x 1.0") makes it convenient to carry in a tool bag.
• Power source – Runs on a single 9V battery (not included).

Applications:

• Ideal for IT technicians, electricians, and home users.
• Perfect for testing network cables in offices, data centers, or home networks.
• Saves time by quickly identifying wiring issues before deployment.