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Handheld coax continuity tester with LED display and four color-coded remote units

Southwire

Southwire M500CX4 Coax Continuity Tester/Mapper electrician tool

SKU CH-39MZ-CM8YB

Tests coax cable continuity and maps up to four remote locations with colour-coded IDs and a simple LED display

  • Product typeTest Equipment
  • Easy-to-understand LED display shows continuity status instantly
  • Tests both patch cables and installed coax runs
  • Maps up to four remote locations with included color-coded remotes
  • Simple operation speeds up cable identification tasks
  • Compact tester fits in tool pouch for on-site use

Simple Coax Mapping Tool

The Southwire M500CX4 is a dedicated coax continuity tester and mapper built for electricians and installers who need to verify cable runs quickly. An easy-to-understand LED display shows results at a glance without complex menus. It identifies up to four remote locations using the included colour-coded ID remotes. The unit works on both patch cables and permanently installed wiring.

Continuity-Only Verification Limits

The tester confirms electrical continuity and maps remote endpoints but does not measure signal loss, impedance or shielding quality. It cannot certify bandwidth for high-frequency data or video standards beyond a basic continuity pass. Results are limited to the four remotes supplied, so larger installations require multiple test passes. No tone generation or cable-length measurement is provided.

Pre-Installation Compatibility Checks

Verify that the cables under test use standard F-type connectors compatible with the tester ports. Ensure all four colour-coded remotes are present before starting a mapping job. Confirm the LED display is visible in the intended work lighting conditions. The tool requires no external power source, so battery condition is not a factor.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $30.99
Cheaper than about 86% of the 5,006 comparable items (median $95.99).

Specifications

Product
Product typeTest Equipment

Questions about this item

How do I choose between the different remote identifiers included with the M500CX4?

The tester comes with four color-coded ID remotes that let you map up to four separate coax cable runs at once; pick the colour that matches the location you are testing.

What does the LED display actually show when I connect a cable?

The easy-to-read LEDs indicate continuity status for each connected remote, so you can immediately see which of the four cable paths are complete or open.

Does the M500CX4 use a standard coax connector type for testing?

It connects directly to standard F-type coax terminations on patch cables or installed wiring, letting you verify continuity without adapters.

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