Brand new with high quality
it can measure the USB-powered devices empty and .
Easy to use and practical.
Compact and easy to carry, no additional power supply, plug and play.
It can easily measure the output voltage of the USB port and the device operating current or load voltage
Detect any USB charger such as PC USB, home charger, car charger.
Wide range of applications, any phone, any electronic product, Easy to use.
suitable for factories, laboratories and personal use.
Voltage: 3v-7v error 0.1v
Current :0-2.5A error 0.01A
10 x USB Charger Doctor Voltage Current Meter Mobile Battery Tester Power Detector
10PCS USB Charger Doctor Voltage Current Meter Battery Tester Power Detector