We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two small rectangular USB testers, one with a blue display and one with a red display, each showing voltage and current readings

FORIOT 2Pcs USB Tester Power Meter Blue Red Display

SKU CH-DN8R-BV83Y

A dual USB tester measures voltage and current simultaneously with 0.01 resolution and ±1% accuracy

  • FeaturesBattery Powered, false
  • Sports Team2 Piece
  • TypeAmmeter, Voltmeter
  • Measures voltage and current simultaneously
  • 4 V to 30 V input range with 0.01 V resolution
  • 0 A to 3 A current range with 0.01 A resolution
  • Male plug and female socket for inline testing
  • Compact 60 mm × 28 mm × 15 mm, 22 g each

Dual USB tester kit for power diagnostics

This two-piece set combines a voltmeter and ammeter that show voltage and current simultaneously on blue and red displays. It suits technicians, hobbyists and anyone who needs to verify charger output or device draw without opening a circuit. Each unit plugs inline between a USB-A source and a USB-A load for instant readings.

Sustained measurement within 4 V to 30 V

The meters maintain ±1 % accuracy across the full range while dissipating roughly 0.1 Ω line loss. Resolution stays at 0.01 V and 0.01 A during continuous use, so long charging sessions or load tests remain readable without drift. The 22 g bodies add negligible resistance to the cable run.

Compact inline form factor for bench or field

At 60 mm by 28 mm by 15 mm each tester fits between connectors without blocking adjacent ports. Male and female USB-A ends let you insert or remove the tool in seconds, and the battery-free design means it draws operating power from the circuit under test. No extra leads or adapters are required for basic voltage and current checks.

Highlights

  • Measures voltage and current simultaneously
  • 4 V to 30 V input range with 0.01 V resolution
  • 0 A to 3 A current range with 0.01 A resolution
  • Male plug and female socket for inline testing
  • Compact 60 mm × 28 mm × 15 mm, 22 g each

Specifications

BrandFORIOT
FeaturesBattery Powered, false
Sports Team2 Piece
TypeAmmeter, Voltmeter

Questions about this item

How much power does the FORIOT USB tester itself draw when it is left inline all day?

The meter has a line loss of about 0.1 ohms, so its own consumption is negligible compared with the 4V-30V, 0-3A range it measures.

What connectors must my charger and device already provide for this tester to work?

The tester has a USB-A male plug for the charger side and a USB-A female socket for the device side, so both must use standard USB-A ports.

Will the 0.01 V and 0.01 A resolution still be useful when I check an older 5 V, 1 A phone charger?

Yes, the 4V-30V voltage range and 0-3A current range cover that charger, and the ±1 % accuracy with 0.01 steps lets you see small voltage drops.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.