This is the wireless speaker system that streams music throughout an entire home. Each portable speaker (sold individually) transmits audio from a connected computer, tablet, or smart device, and switches between Bluetooth or a free app for flexible streaming options. The speakers produce resonant lows, crisp mids, and precise highs, and can be unobtrusively set up on a desk or bookshelf. Each speaker can also play music via an included aux cable, USB port, or a MicroSD card (required), and has its own power, volume, and playback controls. Rechargeable batteries provide each speaker with up to seven hours of music after a full charge via an included AC adapter.