The am/fm digital muff with hearing protection features a built-in radio with switch key and volume adjusting key.It has a channel memory function with eight (8) different preset channels.The muff utilizes an input jack for your mp3 or cd player, an auto search and frequency scanning function, and an extra wide headband with soft padding.It comes with two aaa batteries.Type: Electronic EarmuffColor: BlackNrr: 25 dBQuantity: 1Style: Over the HeadBattery: AAAMaterial: Polymer