HEOS is a true multi-room system. You can play the same song in every room or any combination of rooms you choose, including a different song in every room. These are distinct advantages over other wireless systems such as Airplay and Bluetooth. HEOS uses standard home wireless technology so you can use your existing router without the need for any new equipment such as a bridging device. The wireless range and sound quality is far superior to Bluetooth and any device on your network running the free HEOS app can control every speaker. Only HEOS comes with 100 years of audio expertise from Denon.