Cardo Systems Launches New Upgraded scala rider G4 PowerSet for Snowmobiles Microphone gain adjustment enables use with both Snowmobiles, motorcycles for intercom, MP3 music, mobile phone and GPS | SnoWest Magazine
Snowmobile Helmet Accessories - Corded Mic | Up North Sports
Interfono Cardo SRTS1116
3.7V 800mAh Replacement Battery For Cardo Scala Rider G4,G9,G9X Bluetooth Headsets: Amazon.co.uk: Electronics & Photo