The CBT Art Activity Book: 100 illustrated handouts for creative Sena 50R Speaker with Sound by Harman Kardon. UPGRADE YOUR SOUND Take your 50Rs audio to the next level with SOUND BY Harman Kardon speakers. These premium speakers were created with the audio experts at Harman Kardon to provide world class sound for the 50R. The speaker accessory is compatible with all versions of the Sena 50R, allowing existing 50R owners to upgrade to SOUND BY Harman Kardon audio. Expertly crafted speakers allow the 50R 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. PREMIUM POWERED AUDIO Sena is proud to partner with the experts at Harman Kardon on one of the most advanced sound experiences for motorcycle communication. SOUND BY Harman Kardon speakers packs unmatched audio quality with finely tuned audio equalizers, which can also be adjusted within the Sena Motorcycles App. This speaker accessory is compatible with all versions of the Sena 50R and allows original 50R users to enjoy the full SOUND BY Harman Kardon experience. Original 50R 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. Features: Upgraded SOUND BY Harman Kardon speakers for the Sena 50R Sena's most advanced speakers yet Redesigned speakers by the audio experts at Harman Kardon Compatible with all Sena 50R motorcycle communication devices Access to 5 Adjustable Audio Equalizers in the Sena Motorcycles App