Sena HD Speakers Type B These HD Speakers for the Sena 5S, 10C Pro and 10C Evo were designed to deliver crisp communication sound quality and a premium music listening experience.  * Up to 50% Higher Audio Clarity * Enhanced Bass * New Beveled Shape * Updated apps with Audio EQ Presets - Sena HD Speakers Type B (5S, 10C Pro, 10C Evo) Size