The USA-740 comes with a microphone so that you can take handsfree calls with the built-in Bluetooth and also allows you to stream music from your phone, to the radio, and out your car's speakers. In addition to having Bluetooth built-in, the USA-740 is the only Custom Autosound radio that has a subwoofer pre-out, a 7 color LCD display, and auxiliary inputs in both the front and the rear The USA-740 is the top-of-the-line Custom Autosound radio and comes with Bluetooth built in.
This guide will explain the differences and also help recommend the right radio for you.
In addition, Custom Autosund also has the Slidebar radio for select models. There are 3 models of Custom Autosound radios that will fit all of their applications, the USA-230, the USA-630, and the USA-740. Custom Autosound is the original, classic, reproduction radio company and has been helping classic car owner's update and upgrade the radio in their classic car since the 1970's.