Without modification or 'conversion', the RediRad updates the functional, existing radio in your Freedom Machine by adding an AUX port that you can use to enjoy pre-recorded music from almost any portable music device, including your Android or iPhone. No broadcast radio interference! They are available for all eras of vehicles (6 volts or 12 volts, positive or negative ground, AM -only radio or AM/FM radio), are MADE IN USA and are now only $99 plus the ride and taxes, if applicable. Available at http://redirad.com - Use code GRAND at checkout for 10% off your order thru 10/31. Thank you for supporting an American small business!