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A cable tester, not a power meter

Treedix USB CABLE tester: pins, resistance, E-marker, 2.4 in colour screen

A battery-powered USB cable tester that checks internal pin connections, resistance values, basic USB functions and E-marker chips on a 2.4 inch colour display.

Treedix USB cable tester with a colour display and multiple ports

Treedix USB CABLE tester: pins, resistance, E-marker, 2.4 in colour screen

A battery-powered USB cable tester that checks internal pin connections, resistance values, basic USB functions and E-marker chips on a 2.4 inch colour display.

Voltage and current range
NOWHERE IN THE LISTING — this instrument tests cables and does not measure charging voltage or current
Resolution
Resistance values are read, first bullet; no resolution is published
Protocol identification
Reads USB-C E-marker chips and detects USB 2.0, 3.2 and 4.0, first and second bullets — the only instrument in this family to identify anything
Trigger function
Nowhere in the listing
Data pass-through
None — both ends of the cable plug into the tester itself rather than between a charger and a device, fourth bullet
Display
A 2.4 inch high-resolution colour display, fifth bullet
Logging
Nowhere in the listing; battery-powered for portable testing
Amazon reference
B0DYJG773N (same reference on 4 Amazon marketplaces)
EAN
0644197775077
  • It reads E-marker chips, which is what separates two identical-looking USB-C cables
  • Pin-by-pin connection testing, so a cable can be diagnosed rather than binned
  • It does not measure charging voltage or current at all, despite sitting on this shelf

Best for: Sorting a drawer of visually identical USB-C cables into what each one can actually do.

≈ €47
Check price on Amazon

Specifications

Voltage and current range
NOWHERE IN THE LISTING — this instrument tests cables and does not measure charging voltage or current
Resolution
Resistance values are read, first bullet; no resolution is published
Protocol identification
Reads USB-C E-marker chips and detects USB 2.0, 3.2 and 4.0, first and second bullets — the only instrument in this family to identify anything
Trigger function
Nowhere in the listing
Data pass-through
None — both ends of the cable plug into the tester itself rather than between a charger and a device, fourth bullet
Display
A 2.4 inch high-resolution colour display, fifth bullet
Logging
Nowhere in the listing; battery-powered for portable testing
Amazon reference
B0DYJG773N (same reference on 4 Amazon marketplaces)
EAN
0644197775077

A cable tester filed on a power-meter shelf.

It tests cables, and only cables

Tests cables. Internal pin connections. Resistance values. Basic USB functions — charging, data transfer, high-speed signalling. And USB-C E-marker chips.

Both ends of the cable go into the tester. It never sits between a charger and a device, which is what a power meter does.

Why that is still useful

A drawer of USB-C cables is a drawer of identical black objects that do wildly different things. One carries sixty watts, one carries two hundred and forty, one carries no data at all, and nothing on the outside says which.

The E-marker chip inside says which, and this reads it.

The interfaces

Lightning, Type-C, Micro-B, Mini-B, Type-A. USB 2.0, 3.2 and 4.0 detection. That covers a household drawer.

The screen

2.4 inches, colour, high resolution, battery-powered. Portable testing without a computer.

What it does not do

Measure a charge. No voltage, no current, no capacity counter. The Retoo meter in this family does all three for a small fraction of the price, and they answer different questions entirely.

Availability

German, French, Italian and Spanish Amazon stores quoted 47 € to 50 € when this page was compiled.

American and British Amazon stores returned nothing at all, so the buy button there runs a search instead of landing on an empty page.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.

Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.

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    Voltage and current range
    DC 4 V to 20 V and 0 A to 3 A, first bullet
    Resolution
    Nowhere in the listing
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    Trigger function
    Nowhere in the listing
    Data pass-through
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    Display
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    Logging
    A memory function for running or completed measurements, with a reset, fourth bullet
    Amazon reference
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    EAN
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    ≈ €5
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Others on the same shelf

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    Current rating
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    Housing size
    Nowhere in the listing
    Colour coding
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    Contact material
    Nowhere in the listing
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    Not applicable — the lead is supplied made up in 9 AWG
    Mating cycles
    Nowhere in the listing
    Available accessories
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    EAN
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    Railing compatibility
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    Panel size
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    Weight limits
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    Tilt options
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    Supplied hardware
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    EAN
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    Colour coding
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    Contact material
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    Crimp range
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    Mating cycles
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    Check price on Amazon

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