Trac-Com V4 Intercom

Provides a simple and compact solution however, there is a lot of static when outside the car and it picks up the alternator whine when the engine is running. Not really noticeable in the car on track but gives it a feeling of lower quality audio product. The dual 9V battery backup is nice but if the battery dies you can't quickly swap to the other power source. It defaults to the 9V battery when plugged in and needs a #2 Ph screwdriver to open the battery door. Really wish it had bluetooth connection or 3.5mm input jack for the Garmin or other radio, and output for cameras.