Cardo Scala Rider Teamset No cell phone required for rider to passenger intercom!!! Syncs with Bluetooth Phones, GPS, and Music Devices Mounts to almost any helmet in less than 5 minutes. 2 Slim Stereo speakers mount with velcro Module is snap off design to remove from helmet if helmet is left on bike. Intercom Unit allows hands free wireless communication with passenger, conference calls with passenger etc.