USB Voltage and Current Tester, 3–9V

See the voltage and current of a suitable USB charging connection with this compact digital tester. It is for users checking low-voltage USB power during a simple setup test.

• ✅ View both readings — The display shows voltage and current at the same time.
• ✅ Check a charging setup — Place the tester in a compatible USB connection.
• ✅ Compare suitable cables — Readings can inform a controlled cable comparison.
• ✅ Pack a small test tool — The compact body fits an electronics kit.

Read two charging measurements together

Use the tester within its stated voltage and current ranges. Compare readings under the same device and charging conditions; the display alone does not establish cable quality or charger safety.

This tester is not a mains instrument or a USB-PD trigger. Do not expose it to voltage above its stated range, and check connector compatibility before use.

Technical details

• Voltage range: 3–9V
• Current range: 0–5A
• Display: Digital voltage and current
• Size: Approximately 60 × 28 × 15 mm
• Power: Connected DC USB supply
• Colour: Black
• Package: One tester

Add visible voltage and current readings to a suitable USB test setup.

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