Product Features
Feature: Polk Audio XRT12; Delphi MyFi; Sirius S50; Sirius Sportster SOP4
Type of device; Polk Audio XRT12: In-home audio component; Delphi MyFi: Portable XM radio, can record programs to internal memory; Sirius S50: Mobile Sirius receiver, with recorder and MP3 recorder. Features voice announcements for channel selections and other limited voice feedback.; Sirius Sportster SOP4: Mobile receiver, in-home kit sold separately.
Direct input on unit; Polk Audio XRT12: no; Delphi MyFi: yes; Sirius S50: no; Sirius Sportster SOP4: yes.
Remote control with direct entry; Polk Audio XRT12: yes; Delphi MyFi: yes; Sirius S50: yes; voice announcements confirm channel choices; Sirius Sportster SOP4: yes.
Service; Polk Audio XRT12: XM; Delphi MyFi: XM; Sirius S50: Sirius; Sirius Sportster SOP4: Sirius.
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