SF4 with Driver-Passenger or Multi-participant communication
For those who like to ride in smaller groups, the SF4 provides a conference conversation with up to 4 participants up to a distance of 1.2 km.
The SF4 model allows the user to connect to their mobile phone and they also have a built-in FM radio with RDS. And with Audio Overlay™ support, you can even listen to your favorite music AND chat with your friends at the same time! Please note, however, that Audio Overlay™ mostly only works with Android phones, while iOS offers only limited functionality.