This system comes ready to be used in any form of racing from HSR, SCCA, to the top professional level. The system comes with a Motorola Digital CP200D radio for the car, a Racing Radios custom built harness with a push to talk and connection to the driver's helmet. Also added is an external antenna kit perfect for added reception. For the driver there is a Racing Radios helmet kit and a set of foam drivers earpieces. Outside the car for your crew guy or engineer is a Motorola Digital CP200D radio with a Racing Radios Two-Way headset with noise cancelling mic. This is a turn-key system and is ready to be shipped out.