Enjoy multiple playback options including wireless audio streaming over the home network or via Bluetooth directly from your Smartphone. This system also supports hi-res audio and up-scaling of low-quality music files thanks to the Digital Sound Enhancement Engine. Recommended speakers. High-resolution audio playback via USB or DLNA home network streaming. Bluetooth and one-touch NFC music streaming from a Smartphone. Built-in Wi-Fi for wireless music streaming from an iPhone using Airplay or from a PC using DLNA.