Designed for the ST5 GT helmet, this microphone and speakers kit integrates into GT's sideports allowing for seamless connection when swapping drivers in endurance racing. This electronics kit features both earmuff speakers & 3.5mm jack for drivers wanting to dial in their hearing preference. This audio can be used together or seperate. Additionally this kit utlizes a premium gentex boom mic in which drivers can expect crystal clear communcation through their helmet.