Sirius-XM XVSAP1V1 XM Skydock: * Compatible with iPhone, iPhone 3G/3GS/4 and iPod touch * Controls XM radio with iPod or iPhone * Built-in XM tuner * Audio and FM output * Antenna connector * 180-degree dock * Replay Feature: Pause, rewind and replay up to 30 minutes of live radio * Easy Installation: Powerconnect FM transmitter works through vehicle radio * Portrait or landscape view * Flexible stalk, power button and FM control button * Charges iPod or iPhone while playing * Free XM Skydock app required and available for download from iPhone app store * iPod touch and iPhone models require OS 3.0 or later