<http://schema.org/category>
"Electronics &gt; Audio &gt; Audio Components &gt; Audio Transmitters &gt; Bluetooth Transmitters"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.cyclegear.com/accessories/sena-10u-supplies-kit-for-schuberth-c3c3-pro-and-arai-full-face-helmets>