Description
Ethernet Cable Tester, Network Tester and Wire Tracer for RJ45 RJ11 Lines
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No more guessing which line is live: this continuity tester traces RJ45 network cable and RJ11 telephone line ends in seconds
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Skip the trial-and-error rewiring: smart polarity recognition reads positive and negative DC electrodes the instant you connect
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Keep working after the lights go out: the built-in LED flashlight lights up dark workspaces while you test
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Hear the result, not just see it: the included earphone gives adjustable-volume audio feedback even in noisy environments
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Test more than one cable type: crocodile clip leads adapt the tester to extra cables and connection points beyond RJ45/RJ11
Chasing a dead network jack or a crossed phone line usually means pulling cables apart one at a time and hoping. This ethernet cable tester and RJ45 RJ11 network tester turns that guesswork into a quick pass or fail: clip on, press the button, and the sequence lights show exactly which pair is carrying signal. As a wire tracer or cable tracker, it follows a run from the crocodile clip leads at one end back to the receiver at the other, so you always know which cable you are looking at.
A network tester and telephone line tester in one, it processes RJ45 and RJ11 signals side by side, and the same unit doubles as a line tracer through its crocodile clip adapters when there is no plug to connect to. The proofreading mode runs an on/off sequence across the line so a break or a crossed pair shows up on the display instead of staying hidden, and the single-button operation keeps the whole test to one hand.
Why choose Tuzwa
RJ45 RJ11 Cable Tester
| Feature |
Tuzwa |
Others |
| Tests RJ45 network and RJ11 phone lines at once |
✓ |
✕ |
| Detects DC polarity in seconds |
✓ |
✕ |
| Built-in LED flashlight for dark spaces |
✓ |
No light |
| Adjustable-volume earphone feedback |
✓ |
Beep only |
| Crocodile clip leads test extra cable types |
✓ |
Not included |
| 30-day easy returns |
✓ |
Varies |
Key Features
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Dual signal verification: it checks RJ45 network cable and RJ11 telephone line connections side by side, one test for both interfaces.
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Instant polarity detection: DC positive and negative electrodes are read within seconds through the cable sequence and flash indicators.
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Precision line tracking: the crocodile clip leads carry the transmission test so a run can be traced and identified accurately.
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Adjustable audio feedback: volume on the included earphone cable is user-set, so signals stay clear even over shop noise.
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Network cable diagnostics: a proofreading mode checks cable integrity by cycling the connection on and off in sequence.
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Adaptable connectivity: the crocodile clips let the tester reach beyond RJ45/RJ11 plugs to other cable types and connections.
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Integrated lighting system: a bright LED flashlight lights the workspace while you test, so dark corners are not a problem.
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Multifunction interface: sequence lights show connection status, polarity and verification results together on one display.
Specifications
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Interfaces: RJ45, RJ11
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Testing: Network, Telephone
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Clips: Crocodile Style
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Audio: Adjustable Volume
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Light: LED Flashlight
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Switch: Manual
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Detection: DC Level
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Display: Sequence Lights
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Cable: Earphone
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Mode: Proofreading
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Test Type: Polarity
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Input Voltage: DC Power
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Operation: Single Button
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Environment: All Conditions
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Available Colors: Black, Red
Package Includes:
- 1 x Receiver
- 1 x Transmitter
- 1 x RJ45 Adapter
- 1 x RJ11 Adapter
- 1 x Alligator Clip
- 1 x Earphone
- 1 x Instruction Manual
Right for you if
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✓You install or repair network wiring — it tests RJ45 and RJ11 at every connection point
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✓You need polarity confirmed before you power up — DC positive/negative shows in seconds
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✓You work in dark spaces — the built-in LED flashlight lights up the workspace
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✓You want audio, not just a light, to confirm a line — the earphone gives adjustable volume feedback
If two or more of these sound like you, this is the one.
FAQs
Q: Does this tester work on both network and telephone cables?
A: Yes, it tests RJ45 network cables and RJ11 telephone lines through the same dual signal interfaces.
Q: How does it show which wire is positive or negative?
A: Smart DC level detection reads the polarity within seconds and shows it through the cable sequence and flash indicators.
Q: Can I use it in dark spaces?
A: Yes, the integrated LED flashlight lights the workspace while the sequence lights show your test results.
Q: What is the earphone for?
A: It plugs into the tester to give adjustable-volume audio feedback, so you can hear a good connection over background noise.
Q: What comes in the box?
A: A receiver, a transmitter, RJ45 and RJ11 adapters, an alligator clip, an earphone and an instruction manual.
