Premium sound for your 50S with SOUND BY Harman Kardon speakers and microphone. The 50S Universal Clamp kit with SOUND BY Harman Kardon features enhanced speakers and microphone, which were developed alongside the audio experts at Harman Kardon. The redesigned microphone and expertly crafted speakers allow the 50S to capture and deliver unmatched incoming and outgoing audio. The speakers send crystal clear audio to riders' ears while the microphone, with a newly designed sensor, provides robust performance for voice communication while riding. Original 50S users who upgrade their clamp kit will need to update their device's firmware and enable the SOUND BY Harman Kardon speakers in the Sena Motorcycles App.