Static-free audio connection hardwired directly into the vehicle"s FM radio.Features:-Static-free sound: Static-free audio connection for your Satellite Radio, hardwired directly into your vehicle"s FM radio behind the dash. Single button switching between Satellite Radio and FM Radio: Easily switch between Satellite Radio and regular FM Radio with a touch of your Satellite Radio"s power button.-Works with almost any vehicle: Includes everything for most vehicle installations (antenna adapters may be required and are sold separately by professional installers) Includes: FM Direct Adapter, User Guide.-Compatible with all SIRIUS brand Dock & Play and Portable radios.