Bluetooth Audio System that allows pairing with any Bluetooth device (iOS & Android). Allows the user to enjoy two music channels: Bluetooth Audio streaming and FM tuner. The control is managed by our KBSOUND® BT App, available on Apple App Store (iOS devices) and Google Play (Android devices). Compatible for iOS 7, ANDROID 4.2 and subsequent related versions. Bluetooth signal reach is 10/12 meters. The system can be expanded to an additional four areas if the SLAVE option is activated using our amplifier ref. 13204. Slaves and Master can be turned on joined or separately using the settings menu on the App. Each Master unit has a UNIQUE identifier and password to avoid interference between users nearby.