3M WorkTunes Hearing Protector with AM/FM Radio Noise Reduction Rating (NRR) of 24 dB. WorkTunes Hearing Protector is compatible with any MP3 player, iPoddevice or two-way radio. Use the Input Jack to connect your MP3 Player, iPod, or two-way radio to WorkTunes Hearing Protector. Great AM/FM radio performance and bass boost option for enhanced listening experience Voice Assist Technology provides operational and set-up guidancewithout having to take off the headset Voice Assist Technology helps you program up to 50 AM/FM radio stations and lets you know when your battery is running low Auto-scanning helps you quickly find and save your favorite stations