Quick Overview

1. Compact and easy to carry, no additional power supply, plug, and play
2. It can easily measure the output voltage of the USB port and the device operating current or load voltage
3. Detect any USB charger such as PC USB, home charger, car charger
4. Operating Voltage: 3.5 to 7 V
5. Maximum Current: 3 A

 Product Description

Help! This patient is heating up! Is the voltage too low? Is the current draw too high? Is there a doctor in the house? Oh, thank goodness, the USB Charger Doctor (Voltmeter Ammeter) is here! Right on time?Doctor, can you tell us what the current draw is? What about the voltage? Thanks to the Doctor, you will now be able to watch and care for your USB-powered projects.

Use the USB Charger Doctor to measure the working voltage and current output for any USB port and project. This blue plastic dongle plugs between a USB device and passes the data lines through. There?s a 0.05-ohm resistor in line with the power pin that is used to measure current draw.