USB Charger Doctor dongle is to measure the
working voltage and current output for any USB port or project. It can measure
the current draw of USB-powered devices and is easy to use and practical.
Compact and easy to carry, no additional power supply needed as it draws from
the 5V port. It can easily measure the output voltage of the USB port and
the device operating current or load voltage. Detect any 5V USB charger such as
PC USB, home charger, car charger cell phone + tablets. Wide range of
applications, any phone, any 5V electronic product. You will get 4 units in the
Easy to use! It flips between voltage and
current readouts every 3 seconds or so. Detection range voltage: 3vdc-7vdc
error 0.1v. Current :0-3A error 0.01A. It is a very handy tool for testing USB
devices, checking load levels and debugging batteries.