The meter plugs inline between your device and charger or USB port. The LED display alternates between voltage (Volts) and current (Amps) every few seconds. It is powered from the USB port and requires no external power or probes to operate.
Measurement Range: Voltage: 3~7.5VDC; Current: 0~2.5A;
This meter is a great tool to use when determining USB power supply requirements, or for general purpose troubleshooting.