This is Stilo's Entry level intercom for use with their WRC range of helmets and headsets. This is the one that can be used with a Peltor helmet (when used with an adapter).
The WRC 03 is a really good quality intercom. It uses a 9v battery and only switches on when you connect to the Navigator's plug. It is shaped to fit to the rollcage and has seperate controls for the driver and navigator.
On the rear of the amplifier is a camera output. If you want to power the amplifier from the car using a 12v connector, you can add the adapter (Part number YB0100), but instead I would recommend opting for the WRC DES 9v amplifier that comes with the adapter and some other features.