3.5V-7V USB Charger Doctor Battery Voltage Current Meter Testers - Blue

About this item \n \n- It can measure the USB-powered devices empty \n- Each USB meter tester has been built-in circuit with containing CW3002D chip for accelerating Large Current Fast Charging. \n- Easy to use and practical, \n- rafted from high-grade LCD monitor with low power consumption feature, bright and clear enough to monitor the parameters on the screen. \n- Compact and easy to carry, no additional power supply, plug and play,