With Link1, you can make any audio device a part of an Audio Pro Multiroom system. Simply connect it to active speakers, a stereo system, radio, or receiver. As long as there is an audio input available (outputs: 3.5 mm stereo AUX jack and optical TOSLink), all audio devices on the network can become multiroom players. Supported audio formats include: MP3, WMA, AAC, FLAC, Apple Lossless; additionally: Audio Pro Multiroom, Spotify Connect, and Apple Airplay. Integrate your favorite speaker into WiFi and stream in high-resolution quality to your existing system, and group it, for example, with Audio Pro's C-series. Play your favorite music on all speakers simultaneously or let everyone in the house play their own music in their own rooms. Drag & drop to connect speakers into groups or split the signal into left and right. Just the way you want it. Whether it's speakers, a stereo system, radio, or receiver – with the 3.5 mm jack and TOSlink optical connection, you can make almost anything multiroom capable. It's easy. Audio Pro knows everyone says that, but it really is. From the lightning-fast setup to use, it's a breeze. The app is available for free in the Google Play Store and the iOS App Store.