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

nVent GARDNER BENDER GUSB-3450 USB Multimeter Digital Tester

SKU CH-F1AV-XPE01

A pocket-sized USB multimeter checks voltage, current, cable wiring and polarity with an auto-switching digital display in a high-impact 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 cable polarity for quick USB diagnostics
  • Digital screen auto-switches between volts and amps for instant readability
  • High-impact housing protects internals from drops and daily job-site wear
  • Pocket-sized at 2.56 in long and .05 lb for easy carry
  • Works with solar chargers, wall ports and vehicle USB outlets

USB multimeter for voltage and current testing

The nVent GARDNER BENDER GUSB-3450 is an inline USB tester that measures voltage, current draw, and cable polarity on a single digital screen. It suits technicians, solar installers, and anyone troubleshooting slow charging on phones, tablets, or portable power banks. The pocket-sized tool fits directly between a USB-A port and cable for immediate readings without menus or external power. Builders who need logging, data export, or multi-port analysis will require a different instrument.

Limited to USB-A inline measurements only

The tester operates exclusively through a standard USB-A plug and receptacle, so it cannot evaluate USB-C Power Delivery, Quick Charge negotiation, or proprietary fast-charge protocols. Its display alternates between volts and amps automatically, providing real-time figures but no graphical history or threshold alarms. Solar-powered operation means the unit draws no battery, yet the readout may dim in very low ambient light. Users verifying high-power laptop chargers or multi-voltage PD profiles must use a dedicated Type-C analyser.

Verify port type and expected current range

Before ordering, confirm the source ports you intend to test are USB-A female sockets; the tester will not connect to USB-C, micro-USB, or barrel-jack outputs without adapters that add resistance and skew results. Check that the devices under test draw current within the meter’s readable range, as very low standby currents or very high surge peaks may fall outside the display resolution. Ensure the 2.56-inch length clears adjacent ports on dense hubs or vehicle dashboards.

Highlights

  • Measures voltage, current and cable polarity for quick USB diagnostics
  • Digital screen auto-switches between volts and amps for instant readability
  • High-impact housing protects internals from drops and daily job-site wear
  • Pocket-sized at 2.56 in long and .05 lb for easy carry
  • Works with solar chargers, wall ports and vehicle USB outlets

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

Which version of the GUSB-3450 USB multimeter should I choose for testing voltage, current and cable polarity?

The GUSB-3450 is a single model that checks voltage, current, charging cables, current draw, wiring and polarity with one inline USB connection.

What do the alternating voltage and current readings on the digital screen tell me about a charger or cable in use?

The screen switches between volts and amps in real time, letting you see the actual output of a USB port or solar charger and the draw of the connected device at a glance.

What USB interface does the GUSB-3450 use and what measurements does it support?

It plugs inline with a standard USB connection and measures voltage, current, cable integrity, wiring correctness and polarity for USB-powered devices.

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