Intercom Sparco IS-200 6.3 mm Female

The Sparco IS-200 is a good entry-level racing/rally intercom that gives you what you need to communicate with your co-driver/passenger.
Unlike the more expensive models from Sparco, the Sparco IS-200 has no ability to connect a mobile phone or an extra radio, however you can route the audio from the intercom out to your camera (via RCA connector). The IS-200 has 6.3mm connectors (looks like an electric guitar cable) and does NOT work with Peltor/Nexus connectors.

The intercom amplifier from Sparco has two separate volume controls, one for the driver and one for the passenger.
Powered via the car's 12V system, or via a separate 9V battery (placed in the intercom amplifier).
Connects to your helmet/headphones with 6.3mm "Female" connectors.
Prepared for mounting on both flat surfaces and tube/round surfaces, mounting hardware included.