Sequre TVA3006 is a handy voltmeter and ammeter for USB connectors. The meter plugs in between the power supply/power bank and the appliance. The 1.14" LCD display then clearly displays data such as voltage, current, capacity, energy and time.The Sequre TVA3006 has both USB-C and USB-A connectors, making it highly versatile. It supports voltages ranging from 4.5-30V and currents from 0 to 6A. The box is 3D FDM printed.