With this handy USB power supply you can get any voltage from 0.5V to 30V and up to 1A current. Just plug it into your USB power bank or USB phone charger. Then adjust the voltage using the dial knob of the potentiometer. Built-in output voltmeter and ammeter with digital LCD display with 0.1V and 0.001A resolution.
Great for electronics and science experiments where you need an adjustable voltage power supply.
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