Sena 20S Motorcycle Bluetooth Communication System Mounting Accessory Sena 20S Mounting Accessories/Supplies Kit Replacement helmet accessories kit for the Sena 20S Bluetooth Headset. 1 x glued surface mounting adapter. 1 x foam cover for boom microphone 2 x speaker pads. 1 x Allen wrench 2 x VELCRO brand fastener pads for speakers