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Compact rectangular USB multimeter with high-impact housing and digital display

nVent GUSB-3450 USB Multimeter Electrical System Tool

SKU CH-E58K-X5MWE

Measures voltage, current and cable polarity on USB chargers with a rugged, pocket-size housing

  • FeaturesUSB Multimeter tester, UL, Solar Powered, false
  • Height1 L x 0.5 W x 2.56 H inches
  • Width1 L x 0.5 W x 2.56 H inches
  • Length1 L x 0.5 W x 2.56 H inches
  • Weight0.05 pounds
  • Sports Team1 Piece
  • Measures voltage, current, and polarity on USB ports
  • Alternating digital display shows volts and amps automatically
  • High-impact housing protects against drops and daily wear
  • Pocket-sized at 2.56 inches long and .05 pounds
  • Works with solar chargers, wall outlets, and vehicle ports

USB multimeter for voltage, current, polarity

The nVent GUSB-3450 is a pocket-sized inline tester that plugs between a USB port and a cable to show real-time voltage and current on an alternating digital display. It suits technicians, solar installers and anyone diagnosing slow charging or faulty cables. The high-impact housing protects the electronics from drops, grease and daily job-site wear. Packaging may still carry the former Gardner Bender branding while the transition to nVent completes.

Single inline plug measures volts and amps

The decisive specification is the single inline USB connection that automatically alternates between voltage and current readings without menus or mode buttons. This design lets you verify wiring polarity, confirm port output specs and measure actual current draw in one step. No external power source is required; the tester draws its operating power from the line under test. UL certification is noted in the feature list.

Handles USB-A ports and cables up to 2.56 inches

The tester comfortably evaluates standard USB-A chargers, solar panels, vehicle ports and power banks while the rugged shell survives toolbox abuse. It runs out when a task demands USB-C, micro-USB or Lightning connectors, when continuous data logging is needed, or when the test point cannot accommodate the 2.56-inch inline form factor. For those scenarios a different interface or a bench-grade analyser is required.

Highlights

  • Measures voltage, current, and polarity on USB ports
  • Alternating digital display shows volts and amps automatically
  • High-impact housing protects against drops and daily wear
  • Pocket-sized at 2.56 inches long and .05 pounds
  • Works with solar chargers, wall outlets, and vehicle ports

Specifications

BrandaFe Power
FeaturesUSB Multimeter tester, UL, Solar Powered, false
Height1 L x 0.5 W x 2.56 H inches
Width1 L x 0.5 W x 2.56 H inches
Length1 L x 0.5 W x 2.56 H inches
Weight0.05 pounds
Sports Team1 Piece
TypeClamp

Questions about this item

What does the alternating volts-and-amps readout tell me about a USB port in use?

The screen cycles between voltage and current so you can see the actual power the port delivers while a device is charging, letting you spot under-voltage or excessive draw instantly.

Which USB connector standard does the GUSB-3450 plug into?

It uses a standard USB-A male plug on one side and a USB-A female port on the other, so it fits any USB-A charger, power bank or solar panel without adapters.

How much space does the tester add between the charger and the cable?

The housing measures roughly 2.56 inches long, 1 inch wide and 0.5 inch deep, adding only a short inline section that fits in tight outlets or crowded power strips.

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