For B2B/OEM/ODM or customize sourcing, please contact original manufacturer of this item via: email@example.com or fill in bottom inquiry form.
Charger Doctor USB Current And Voltage Tester
Simple and convenient to use.
Portable and easy to carry.
The voltage and current will be displayed circularly.
plug and play,it can work without additional power supply.
The USB tester can test voltage and current of the power supply equipment with USB port .
For B2B/OEM/ODM or customize sourcing, please contact original manufacturer of this item following belows:: Email: firstname.lastname@example.org | Skype: chinaok321