High precisionThe tester uses a new generation of power four semi double loop integral converter IC with a precision bandgap reference range accy high precision stable and reliable performance strong antiinterference ability.MultifunctionIt can measure the voltage of the USB power supply device when it is empty and loaded and the voltage and current of the USB terminal device when it is working.Easy to useCurrent and voltage cycle display easy to use and clear at a glance.Can easily measure the operating current of the output voltage of the USB port and equipment.Small sizeSmallsize no power and other ancillary equipment plug and play also detect USB charger output voltage and current are standard suitable for factories Laboratory and users.Package Included2 X USB tester