The Rugged Radios rear seat expansion kit pairs with helmet kits or headsets and includes the Ultimate behind-the-head headset option. This expansion package is intended to extend a vehicle’s communication capability to rear-seat occupants and lists the Ultimate behind-the-head headset among the compatible choices for helmet or headset integration.
Rugged Radios Rear Seat Expansion Kit w/ Helmet Kits / Ultimate Headset - Behind the Head