Goodbuy USB voltage and current meter, 4–20 V, 0–3 A

A small USB tester that sits between the charger and the cable and shows voltage, current, delivered capacity and time on an LCD screen. It makes it easy to check whether a charger and cable deliver the current you expect, and how much energy a device took while charging.

The tester takes 2 readings per second and draws about 10 mA itself. A RESET button clears the readings, and it measures 73 × 13.5 × 23 mm.

• Voltage. DC 4–20 V
• Current. DC 0–3 A
• Capacity. 0–99999 mAh
• Time. 0–99 h
• Display. LCD, RESET button
• Dimensions. 73 × 13.5 × 23 mm
• Manufacturer code. GBUSBTEST