Philips AD348/37 Docking Speaker for all iPhone and iPod models Bass Reflex Speaker System delivers a powerul, deeper bass 8W RMS total output power with Shielding Technology to block mobile phone interference MP3 Link for portable music playback and Play/Charge your iPod/iPhone simultaneously Advanced Versatility: Auto clock synchronization with iPod/iPhone when docked. Dock an iPod/iPhone, even in its case Compact design for any space, any lifestyle.