Onkyo battery-free memory backup stores them safely even if you disconnect the system. Bluetooth Streaming whatever audio is playing on your phone, tablet, or PC app can be streamed to the receiver with Bluetooth wireless technology. The CS-N575 puts any music you can imagine at your fingertips, with a new JOG dial and information-rich LCD so easy to use you don't need control apps to find music fast. USB Connection for iPod/iPhone/IPad Connects almost any iPhone, iPod touch or iPod Chromecast built-in, compatible with Onkyo App, Bluetooth Streaming, 20 W/Ch Power Output, 40 Radio Presets, USB, 2-Way Acoustic Suspension Speakers.