The Rugged Radios rear seat expansion kit pairs with helmet kits or headsets and includes the AlphaBass over-the-head headset option. Designed to bring communications to rear passengers, this kit supports helmet or headset choices and specifically cites the AlphaBass over-the-head style as a compatible option.
Rugged Radios Rear Seat Expansion Kit w/ Helmet Kits / AlphaBass Headset - Over the Head