SFR Low-Profile Communication SystemThe SFR Bluetooth communication system has 4-way intercom functionality, providing connectivity perfect for small groups of ridersThe slim SFR connects to a smartphone, MP3 Player or GPS so that you can easily listen to music, hear turn-by-turn GPS directions and make phone callsRiders can listen to music and use the intercom simultaneously, using the Audio Overlay™ featureUse the hook & fastener or double-sided adhesive tape to securely attach the SFR Bluetooth device to your motorcycle helmetLink the Sena SFR Bluetooth device to the Sena SF Utility App (available for iPhone and Android) to easily configure device settings and quickly access guides. You can also sync your SFR to the Sena RideConnected App, which allows for a virtually limitless amount of riders over an infinite range, as long as you are connected to a mobile network.