The Peltor 3M SportTac Electronic Shooting Ear Muffs is perfect for range, sport hunting or hunting use. The defining characteristic is it is an intelligent and active hearing protector. The built-in, smooth adjusting active-volume function offers less interference and pleasant sound reproduction. This model comes with two interchangeable shells of different colour enabling one to dissociate between say shooter and student. The headset is collapsible and an automatic shut-off function. An audio input has been incorporated for an external radio.