The entire 50 series from Sena is equipped with sound from Harman/Kardon. The Sena Quantum series features advanced speakers and microphones, which the manufacturer claims improves communication while riding a motorcycle. Voice control works with digital assistants, and users can choose between three different communication modes. For example, it is possible to communicate with a private group of up to 24 participants over a range of up to eight kilometers. Public groups allow communication with an unlimited number of users. Additionally, Sena devices come with classic Bluetooth connectivity, enabling interaction with other devices as well.