In my teryx 4 with good Aviation headphones. The volume is quite loud, the noise cancellation can be easily adjusted. There is also an expansion module for rear passengers. Connect music via the inputs and outputs to talk over the phone (or an external speaker). Sooooo much cheaper than a $1000+ "off-road" intercom. I spent about $420 for two front headsets, an intercom and expansion module, and two sets of helmets, worth every penny! Makes climbing more enjoyable and fun to interact with everyone. You can insert a 9V battery and connect to a wireless network or use a cigarette adapter. I applied sealer to the edges and now it's waterproof, just don't pressure wash.
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