iKKEGOL USB PC Amp Voltage Current Meter Detector Reader Test Charger Doctor Tool (3.5V-7.0V, 0-3A) for Mobile Phone Cel

Compact and easy to carry, no additional power supply
Current and voltage loop display, easy to use and practical
USB charger can detect whether the target output voltage and current.
Stable, reliable performance, anti-interference ability, high temperature
Convenient measurement of the output voltage of the usb port and the device operating current