Part No- SC-A0354 Sena 50S Universal Helmet Clamp Kit Universal clamp kit for the 50S Bluetooth motorcycle communication system. Includes fasteners, speaker pads, microphone sponges, speakers and microphones, and more. Also compatible with 20S EVO and 30K Replacement helmet clamp kit for the Sena 50S Bluetooth Headset. This kit can be used to set up a second helmet to receive your Sena 50S Bluetooth Headset. Includes: Universal helmet clamp Wired boom microphone Wired microphone Glued surface mounting adapter Speakers VELCRO® brand fastener pads for speakers VELCRO® brand fastener pad for boom microphone VELCRO® brand fastener pad for wired microphone NOTE: Product features listed / packaging / specifications / appearance / accessories subject to changes without any further discretion or updates by SENA.Images shown for illustration purpose only. #TeamMotoCentral