Grainger offers three models of the Condor Electronic Ear Muffs, all with volume controls that can be adjusted up or down so wearers can listen to their surroundings, carry on normal conversations and be protected from sounds more than 85 decibels. They are equipped with LED power indicators and operate on AA batteries in the left ear cup. The volume control on the #4FRL9 Electronic Smart Muff can be changed from maximum amplification to total shut off, with variations from active communication to passive protection. The #4FRN1 Electronic Radio Ear Muffs feature a built-in FM radio receiver, stereo input jack for use with CD and MP3 players and stereo connection cable. Its electronic sound reduction allows the wearer to control external sounds while being protected from harmful ones. The volume control on the #4FRN2 Electronic Clip-On Ear Muffs also can be adjusted from maximum amplification to off. It is equipped with a universal adaptor for easy connection and for use with a hard hat.
