"Amperímetro USB Voltímetro Voltaje Corriente Capacidad de Alimentación Pantalla LCD Detector"
You can detect the quality of MicroUSB line. 1 x USB Power Tester. Capacity range: 0-19999mah. Accuracy: plus or minus 1%. Current resolution: 0.01A. The current sample is 25 milliohm and the loss is smaller.