Packtalk 2nd helmet kit with Sound by JBL - Cardo Systems
Amazon.com: CARDO PTB00101 JBL PACKTALK BOLD DUO Sound by JBL HEADSET 2-PACK, PTB00101 Motorcycle Bluetooth Communications System Sound by JBL DUO PACK, PTB00101 : Automotive
Amazon.com: Cardo 45mm Audio Set, Works with Most Helmet Communicators (Single Pack) : Automotive