Harman Kardon Aura Wireless Home Speaker System (Black) Six mid- to high-range 1.5"transducers deliver accurate, Omni-directional sound while a 4.5"subwoofer gives rich, powerful bass Custom, stereo-widening DSP audio technology is engineered for room-filling, full frequency sound Built-in Bluetooth feature streams audio from your Bluetooth devices wirelessly Customized Harman Kardon Remote app allows for easy set-up and added connectivity