The Cavallino Gt 1 Is The Ultimate 2.2.1 Speaker System With A 6.5 Inch Integrated Subwoofer Featuring The Innovative Class Hd Audio Patented Technology. Class Hd Is A Patented Amplifier Technology Delivering High Efficiency & High Performing Density. A Digital Signal Processor (dsp) Controls The Crossover & Equalization Providing Top Performance, A Natural Musical Tone & Extended Low Frequency Response. a luxurious Design With High-tech Features, Sumptuous Leather Surfaces Inspired By The Excellent Craftsmanship Found On The Gt Cars. The Gt 1 Is Fully Compatible For Use With All The Latest Devices On The Market: Bluetooth Technology To Listen To Music In Wireless Mode Via Android Or Windows Os Based Devices Or Via The Apple Dock Connector Ti Upload & Play On Apple Devices.