B+COM ONE for Wired Microphone (For full-face helmets) + Option Helmet Speaker Set 5 Small, thin speakers (Outer diameter φ40→φ28, thickness 10.2→6.8mm). Used with an Arai Astro GX. Used about 10 times for touring. Accessories include the manual in the photo, charging cable, speaker adjustment pads, and sponge for the wired microphone; nothing else is included. Purchased in December 2021. The standard speakers were thick and hurt my ears, so I switched to the smaller speakers. Therefore, the sound is quieter, and the sound quality has also decreased. The standard speakers are not included. (Arai helmets are difficult to fit.) For installation: The "base Velcro fastener" (magic tape) to attach to the helmet is not included, so please purchase it separately. The speaker Velcro fasteners have been removed to make them even thinner and are attached with double-sided tape. Thank you for viewing.