The entry-level model intercom from Italian ZeroNoise Devices
This model allows you and the co-driver to talk to each other with good sound quality without interference.
The connection on the ZeroNoise Valiant is standard 6.35 mm (Stereo jack) so we can offer good intercom kits that fit both Jet helmets and Intergral helmets (See related products below). Intercom works both with 9v battery or connects directly to the car's 12 volt system with helmet by the included cables which are 2 meters.
The ZeroNoise Valiant also has an audio output for the on-board camera so you get the driver and co-driver's voices on the video.