Philips Refurbished SBD7500/37 Fidelio Portable Speaker Dock for iPod/iPhone: * wOOx technology for rich yet precise bass without distortion * DBB to preserve low tones for deep bass at any volume level * Shielding technology to block mobile phone interference * Elegant, slim and compact design to fit into any briefcase * Battery or AC power option for music enjoyment anywhere * Dock any iPod/iPhone, even in its case * AUX-in for easy connection to almost any electronic device * Discover, share music and more features via free Fidelio app