USB Power Charging Current Voltage Tester


This simple device can be used to operate or test servo motors. There are 3 modes to check servos;

  1. Manual mode: turn the knob
  2. Neutral mode: make the servo go back to the neutral point
  3. Automatic: window wiper mode: make the servo swing like a window wiper in the biggest angle. Push button to change between modes. Lights indicate mode.

You can connect 1-3 servos simultaneously. It can also be used to check the operation of any servo motor whether fitted or not.


This is USB Detector Current Voltage Tester. An exceptionally helpful device for USB port checking and charger use it, you can check if the USB port is active or on the other hand if a battery of the external device is a charge or then again if the current isn’t surpassing cutoff points. It accompanies a supporting LED Segment display.

This tester has one information and two yield port where you can check each device in turn or two devices consolidated.


  • Enabled to measure USB devices at no load and overload condition, also for USB terminals testing.
  • Current and voltage display in turn, easy and comfortable to use.
  • Small and portable, do not need other power supply.
  • Measuring range: DC 3V – 9V / 0 – 3A (up to 5A )
  • Portable Device
  • Interface: USB2.0, USB3.0
  • Product Weight: 0.025 kg
  • Two output port

Package Includes:

  • 1 x USB Current Voltage Ammeter Tester


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