Plugable VAMETER3 vs METER3-1MF

Choose the Plugable USBC-VAMETER3 if you want a separate USB-C power meter to move between chargers, cables and laptops. Choose the USBC-METER3-1MF if you specifically want an extra 1 m (3.3 ft) of cable reach and a power display that stays with that extension.

Quick picks and comparison

• For comparing charging setups: get the VAMETER3 and use a suitable USB-C cable you already own. Its screen shows volts, amps, calculated watts and current direction.
• For a desk with a hard-to-reach port: get the METER3-1MF and keep your existing cable. The display sits at the extension's female end, away from its male plug.
• For investigating PD negotiation: jump to the analyzer advice below. Passing USB Power Delivery through a meter is different from displaying its messages.

Both carry a manufacturer-stated 240W charging ceiling and 10Gbps USB data capability. The comparison below uses Plugable's VAMETER3 specifications and its official METER3-1MF documentation; all capabilities remain subject to the complete connection.

Compare specifications and all conditions

What are you buying?

USBC-VAMETER3

Separate inline meter body

USBC-METER3-1MF

Male-to-female USB-C extension with an integrated meter

Added cable reach

USBC-VAMETER3

No extension cable included

USBC-METER3-1MF

1 m / 3.3 ft

Display information documented

USBC-VAMETER3

Volts, amps, calculated watts, current direction

USBC-METER3-1MF

Approximate charge rate in watts

Display placement

USBC-VAMETER3

At the meter body; button flips the screen 180 degrees

USBC-METER3-1MF

At the female end of the extension

Charging support

USBC-VAMETER3

USB PD 3.1 EPR, up to 240W

USBC-METER3-1MF

USB PD 3.1 EPR, up to 240W

USB data

USBC-VAMETER3

Up to 10Gbps

USBC-METER3-1MF

Up to 10Gbps

USB-C video

USBC-VAMETER3

Alternate Mode pass-through; no numerical resolution ceiling given in its own specifications

USBC-METER3-1MF

DisplayPort Alternate Mode up to 4K 60Hz, host dependent

Accuracy information

USBC-VAMETER3

Maker reports within ±3% at 20V

USBC-METER3-1MF

No numerical accuracy specification in the documentation reviewed

Explicit exclusions

USBC-VAMETER3

Thunderbolt 3 devices

USBC-METER3-1MF

Thunderbolt 3, Thunderbolt 4 and USB4 devices

Full comparison table ↔

Swipe to compare. Row labels stay visible.

Buying question	USBC-VAMETER3	USBC-METER3-1MF
What are you buying?	Separate inline meter body	Male-to-female USB-C extension with an integrated meter
Added cable reach	No extension cable included	1 m / 3.3 ft
Display information documented	Volts, amps, calculated watts, current direction	Approximate charge rate in watts
Display placement	At the meter body; button flips the screen 180 degrees	At the female end of the extension
Charging support	USB PD 3.1 EPR, up to 240W	USB PD 3.1 EPR, up to 240W
USB data	Up to 10Gbps	Up to 10Gbps
USB-C video	Alternate Mode pass-through; no numerical resolution ceiling given in its own specifications	DisplayPort Alternate Mode up to 4K 60Hz, host dependent
Accuracy information	Maker reports within ±3% at 20V	No numerical accuracy specification in the documentation reviewed
Explicit exclusions	Thunderbolt 3 devices	Thunderbolt 3, Thunderbolt 4 and USB4 devices

Buying question	USBC-VAMETER3	USBC-METER3-1MF
What are you buying?	Separate inline meter body	Male-to-female USB-C extension with an integrated meter
Added cable reach	No extension cable included	1 m / 3.3 ft
Display information documented	Volts, amps, calculated watts, current direction	Approximate charge rate in watts
Display placement	At the meter body; button flips the screen 180 degrees	At the female end of the extension
Charging support	USB PD 3.1 EPR, up to 240W	USB PD 3.1 EPR, up to 240W
USB data	Up to 10Gbps	Up to 10Gbps
USB-C video	Alternate Mode pass-through; no numerical resolution ceiling given in its own specifications	DisplayPort Alternate Mode up to 4K 60Hz, host dependent
Accuracy information	Maker reports within ±3% at 20V	No numerical accuracy specification in the documentation reviewed
Explicit exclusions	Thunderbolt 3 devices	Thunderbolt 3, Thunderbolt 4 and USB4 devices

These are documented capabilities, not a promise that every combination delivers maximum charging power, data speed and video performance simultaneously.

Best for comparing setups: Plugable USBC-VAMETER3

The VAMETER3 is our default pick for a laptop owner checking several chargers or cables. Plugable documents bidirectional operation, an OLED screen and a button that rotates the display 180 degrees. Its setup instructions explicitly list voltage, amperage, current direction and approximate watts, giving you more information than the cable's documented watt readout.

The separate body is the reason to choose it: move it to the connection you want to inspect while keeping the existing cable arrangement. Plugable describes use between a host and charger, between a host and docking station, and with a bus-powered accessory. A removable meter suits those occasional comparisons better than buying an extension solely to obtain its screen.

There are two specifications to keep separate. The maker lists an operating range of 4.5–50V and 50mA–6.5A, but the port table rates USB-C power at 48V, 5A and 240W. The operating-range endpoints do not authorize a higher-power charging connection.

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Best for extra reach: Plugable USBC-METER3-1MF

Choose this model when the extension itself solves a problem. It adds 1 m (3.3 ft), uses a braided cord and aluminum housing, and places the OLED at the female connector. Plugable describes bringing a rear desktop or docking-station port to a more convenient location with the display easier to see.

Its connector layout matters more than the word “cable.” This is an extension, so a typical laptop setup still uses your existing USB-C charging cable. Plugable's described arrangement connects the male end, which has no display, to the charger, then connects a separate cable to the female end with the display. Operation is bidirectional, so that arrangement is an example rather than a fixed power direction.

The documented readout is approximate watts. The specification pages reviewed do not give a meter voltage/current operating range, numerical accuracy, or a display-rotation feature for this model. Do not transfer those specifications from the adjacent VAMETER3 column in Plugable's comparison table.

The package choice: buy this extension when you already have a suitable charging cable and want more reach. If you need a complete charger-to-laptop connection from scratch, account for the separate cable as well.

Where the screen sits in your connection

The VAMETER3 is a separate inline body; the extension's screen is attached to its female end. Decide where you want to read the display before ordering. These are example arrangements based on Plugable's setup instructions:

1. 1

   VAMETER3

   Charger → separate meter body → existing USB-C cable → laptop. The display stays beside the charger in this arrangement.

2. 2

   METER3-1MF

   Charger → extension's male plug → extension cord → female end with display → existing USB-C cable → laptop.

For a charger behind furniture, our preference is the extension because it can bring the readout forward. For a bag of chargers and cables, our preference is the separate meter because extra reach is not the task. Neither recommendation requires claiming that one meter is inherently more accurate.

Power, data and video: check the whole cable chain

Plugable explicitly says the extension's power, data and video depend on the attached USB-C cable and other devices. Its comparison table also includes ordinary cables with different capabilities: those other columns do not upgrade either meter.

Charging: the 240W rating is a ceiling, not a promised laptop reading. The USB-IF Power Delivery overview explains that devices take only the power they require. Select a charger, device and cable that support the charging mode you need; adding an EPR-capable meter cannot supply a missing capability.

Data: both meter products are documented for 10Gbps USB operation. Plugable's VAMETER3 page uses both USB 3.1 Gen 2 and USB 3.2 Gen 2 terminology; its port table explicitly identifies 10Gbps. Judge the stated speed rather than treating the different revision names as different meter variants.

Video: Plugable specifies the extension for DisplayPort Alternate Mode up to 4K 60Hz, with the host determining support. The VAMETER3 page documents Alternate Mode pass-through without an equivalent numerical resolution guarantee. A successful charging reading does not verify the video path.

Thunderbolt and USB4: the VAMETER3 page explicitly excludes Thunderbolt 3 devices. The extension documentation excludes Thunderbolt 3/4 and USB4 peripherals, while explaining that an ordinary USB-C peripheral can still connect through a computer's Thunderbolt/USB4 port. Distinguish the port's shape and available modes from the protocol your dock actually needs. We would choose a different, explicitly supported connection for a Thunderbolt/USB4 dock.

Docking distance: Plugable's current host-cable support article permits its 1 m extension plus the original 1 m USB-C docking cable for 2 m overall. It does not support longer USB-C host connections or third-party extensions with its products. This is Plugable's docking support limit, not a universal USB-C length rule.

• Yes: Match charging capability across charger, device and every cable in the connection
• Partly: Data and video work only within the connected equipment's supported modes
• No: A USB-C plug or high wattage rating does not establish Thunderbolt or USB4 support

What the display cannot diagnose

Plugable says these meters obtain their readings from the power and ground connections while leaving data lines untouched. Their documented screens do not include a charger's PDO list or a cable's e-marker identity. A live watt reading therefore cannot answer every question about what the charger advertises or what the cable identifies itself as supporting.

For those questions, the ChargerLAB POWER-Z KM003C product page explicitly lists PDO, e-marker and protocol tests, plus USB PD protocol analysis with PC software. Our USB-C power meter guide covers that analyzer alongside simpler displays. For a cable-focused decision, see USB-C cable testers.

For an ordinary charging comparison, keep the laptop, workload and battery state comparable, and change one part of the connection at a time. Record the complete arrangement, not just the displayed watts. This is a troubleshooting method; a smaller number by itself does not establish a defective charger. See How we measure for the site's measurement policy.

If a screen stays dark, Plugable says both products normally need a device connected at each end. Check the complete connection before treating an unlit, partly connected meter as faulty.

Exact variants and the checkout checklist

Check the complete model name: USBC-VAMETER3 and USBC-METER3-1MF are the two products compared here. Plugable's older USBC-VAMETER, without the final 3, is documented for USB PD 3.0 up to 100W, whereas VAMETER3 supports USB PD 3.1 EPR up to 240W. A similar photograph is not enough to identify the version.

For a gift or sale-weekend purchase, write down the recipient's laptop port, charger, existing cable and dock model first. Then choose the detachable meter or the extension deliberately, check the selected SKU, and confirm whether a suitable charging cable is already available. Evaluate the exact package and compatibility rather than a promotion label; this comparison makes no current-discount claim.

How we choose

This comparison is based on manufacturer documentation, not physical testing. We checked Plugable's product specifications, setup notes, accuracy FAQ, variant explanation and docking-cable support guidance, plus USB-IF's Power Delivery overview and ChargerLAB's analyzer specifications. We kept operating ranges separate from connection ratings and did not apply the standalone meter's accuracy result to the cable. Missing specifications remain unknown; our picks reflect the documented functions and the job each layout serves.

Verdict

Get the VAMETER3 for a separate readout you can move between charging setups, especially if you want volts and amps as well as watts. Get the METER3-1MF when its extra 1 m and display at the female end solve a desk-layout problem. If the question is about PD profiles or cable identity, choose an analyzer with those documented functions.