The Mobile Audio Companion application (powered by In Car Experts) is for mobile electronic INDUSTRY PROFESSIONALS ONLY and consists of the following installation and selling tools:- Power Wire: calculates current draw and recommended wire size- Enclosure Volume: calculates internal air volume and generates cut sheet*- Impedance: calculates total impedance (parallel or series)- Port Length: calculates port length- Ohm’s Law: calculates the unknown I, V, R value- Convert Port: calculates a new width or height based on existing port diameter*Cut Sheet feature provides all necessary measurements to correctly build a speaker enclosure meeting entered specifications.