The SENA 5S Slim Speakers are optimised for both physical comfort and impressive audio performance.Impressive audio performanceIncrease in volume, bass boost, and clarityOptimised for Physical comfortEasily fit in the speaker pockets of a helmetCrystal-clear HD two-way Bluetooth intercomThe SENA 5S Slim Speakers have been designed with a bevelled taper and easily fit in the speaker pockets of a helmet, giving the rider a comfortable experience.The Speakers have a marked increase in volume, bass boost, and clarity. Communicating on crystal-clear HD two-way Bluetooth intercom has never sounded so good.