Harman Kardon Aura Plus Wireless Bluetooth Speaker 360&ordm; Hi-Fi Luxury Sound System with Built-in Apple Air Play and Spotify 6 mid- to high-range 1.5" transducers for accurate, Omni-directional sound and a 4.5 subwoofer for rich, powerful bass Custom, stereo-widening DSP audio technology engineered for room-filling, full frequency sound Built-in Bluetooth feature streams audio from your Bluetooth devices wirelessly Built-in Apple Air Play system with easy set-up for your Apple devices, DLNA for Windows and Android devices, and Spotify Connect Customized Harman Kardon Remote app allows for easy set-up and added connectivity