Radians' diffusor electronic earmuff is excellent hearing protection for all hunters and shooters.It amplifies low level sounds while protecting against harmful noise.Listen to your favorite smartphone or mp3 device with the added input jack.A compact folding feature allows for easy storage.The diffusor also features an adjustable headband.This model has a 23db nrr.Type: Electronic EarmuffColor: Tan Ear Cups w/Black BandNrr: 23 dBQuantity: 1 PairStyle: Over the HeadBattery: AAAMaterial: Polymer