Nerdie NASCAR System Race Communications They can be wired for

They can be wired for mono earbuds as well but stereo is the most common

The Nerdie NASCAR System is a 3-conductor race communication system designed by a racer for racers

the microphone impedence and style does not always allow for the same universal interchangeability with a standard NASCAR helmet kit

Spotter headsets are recommended for improved paddock communication

Nerdie NASCAR System Race Communications They can be wired forThe Nerdie NASCAR System is a 3 conductor race communication system designed by a racer for racers, just add your radios. The 2015 Nerdie NASCAR System includes: 1 2015 Nerdie NASCAR Car Harness 1 Push To Talk (PTT) 1 Hosa Coiled Extension Cord 1 Nerdie NASCAR Helmet Kit As an added bonus, a free pair of stereo earbuds while supplies last. That's all the necessary wiring for the car and driver for only $150. 00! Up to 5 additional helmet kits for $25.