These high quality speakers were created with the audio experts at Harman Kardon to provide world-class sound for one of Senas most popular devices, the 50S. Expertly crafted speakers allow the 50S to deliver an unmatched audio experience while riding. The speakers send crystal clear audio to riders ears while listening to music, chatting over the intercom, taking phone calls, and more. This speaker accessory is compatible with all versions of the Sena 50S and allows original 50S users to enjoy the full SOUND BY Harman Kardon experience. Original 50S users who upgrade their speakers will need to update their devices firmware and enable the SOUND BY Harman Kardon speakers in the Sena Motorcycles App. For upgraded speakers and microphone, please see the 50S Universal Clamp kit with SOUND BY Harman Kardon.