The Yamaha YHT-3920BL Home Theater System supports Bluetooth for wireless music playback 4K Ultra HD video with HDCP 2.2 compatibility and features a discrete 5.1-channel amplifier design. This system completely supports with the latest HDMI standards. Thanks to transmission of 4K video at 60 frames per second pass-through you can fully enjoy the high definition video quality of 4K without degradation. It also adheres to the HDCP 2.2 copyright protection standard required for 4K video transmission. The unit comes equipped with Bluetooth functionality that lets you easily enjoy wireless music playback from smartphones and other devices. The Compressed Music Enhancer from Yamaha is now optimized for Bluetooth audio transmissions to ensure that your music will have vivid lively sound quality during wireless playback.