The Stilo WRC DES 9V rally intercom has a number of features over and above the WRC 03 intercom to further enhance the quality of sound and extra items to increase its functionality. While it uses the same WRC 03 intercom system, the 9V model has a switch to enable an extra noise filter, which offers an extra level of noise cancelling in a medium priced intercom. This is a real benefit for noisy rally cars. The intercom features individual volume controls for driver and co-driver and has a connection at the rear for a camera/radio connection. This connection can be altered between an output or an input for the intercom with a switch on the inside of the box. As an input, it allows connection of a team radio or an MP3 player, and as an output for the intercom feed to go to an onboard camera system. Also, within the box there is a switch to boost the volume of the crew's communications, this is ideal when connected to Go Pro style cameras. This WRC 9v also gives you 2 options for powering the system, one with a 9v battery, but also hard-wired to the cars electrical 12-volt power supply. The design of the WRC DES 9V intercom was to allow for easy adaptability to roll cages, to accomplish this, the intercom system features a contoured design allowing for easy install.