The Denon HEOS Link HS2 preamplifier is a key part of the HEOS multiroom system, allowing you to enjoy your favorite music anywhere in the house. Using your existing wireless home network and HEOS app on your iOS or Android device, you can explore, search for, and play music from your music library, online music streaming services, and thousands of online radio stations. The elegant case of HEOS Link in silver tones, has, for convenience, volume and mute sliders, separately placed on the side panel. - High-Res Audio - Bluetooth - Easy to set up and configure - Ports: USB & Ethernet - Outputs: Stereo/ subwoofer/ optical