The Sena 50s brings a premium audio experience. Both the speakers and microphone were created with the expertise of the well known brand Harman Kardon.The combination of the excellent sound of Harman kardon in combination with Sena's best model makes the Sena 50 S exceptional in its range. The sena 50s not only has another audio system but also a new design. The new design of the sena 50 s only has 3 buttons.Which makes the product really friendly to use.