Better ways to spend your money...
I'd love to make this a positive review. Truly, I would. But this is an inferior product, and I think you should know that before you throw away your money as I have.

Other reviewers have mentioned the poor quality of the FM reception. They're telling the truth. Not only is the reception of nearby stations poor, this tuner is incapable of screening out the other stations of similar frequencies. So, not only can't you properly follow the story you're so desperate to hear on NPR, you've got to contend with country western music overlaying said story. And the "reception" (I'm being generous) changes depending on how you're holding your head and on your position on the globe. If you can hear the radio where you're standing, walk ten feet in any direction and all bets are off. Needless to say, wearing them while mowing the yard can be an amazingly frustrating experience.

So, perhaps you're thinking this won't really bother you, since you're planning to use the handy included cord to listen to your MP3 player. Sorry. Plugging in a high quality audio source [I use my iPhone or iPod] only serves to accentuate the extraordinarily poor quality of the other audio components in these headphones/hearing protectors. Really, you'd be amazed how lame they truly are. In fact, the distortion at the modest and modulated levels allowed by the electronics is so bad you might not even recognize a favorite song when it comes along.

I purchased these when my earlier version of the WorkTunes headphones (Peltor WorkTunes AM/FM Radio Headset with 22 dB Reduction Hearing Protector #90545) expired. Overall, I was happy with them, but one channel mysteriously quit working, and I was intrigued with the prospect of listening to an iPod with the new version. I should have kept my money. Don't make the same mistake I have. Benefit from my misfortune. Here's what you should do:

Buy ANY other reasonably priced over-the-ear hearing protector on Amazon and use them over a pair of Apple earbuds (Apple Earbud Headphones (White)) or another high quality pair of in-ear headphones (Apple In-Ear Headphones- M9394G/C). Your ears will thank you and your wallet will, too.

Ear protection + Headphones
These offer fantastic protection to loud noise, while providing FM or AM radio entertainment. This is not your typical headphone.

Works Great
I use it with my MP3 player and it works great. I can hear the music while cutting my grass.

Unbelievable performance
I should have bought this years ago. Amazing performance. I connect it to my iPhone and set a comfortable volume level and never have to change it. Whether I start up my brush-cutter, or table-saw in the wood shop. Clean quiet performance.

Only complaint is that the external input is not an integral part of the amplification system. The volume control on the unit does nothing for it. In fact if you turn the volume on/up while using an external MP3 player, or whatever, you will hear the radio AND your MP3 player at the same time...dumb.

Added bonus though, since I'm using an MP3 phone (iPhone) I can hear when I get a call even though I'm using really loud equipment.

Awesome - wish we had them a long time ago!
I got three sets for my firewood company a few weeks ago. Everybody loves them! The digital tuning seems like an essential feature, no fiddling with the tuning to find different stations. We work outside in a rural area and reception comes in pretty good on most stations - AM is sketchy. Overall I really recommend this headset if you are doing anything that requires hearing protection for a length of time. You won't know how you lived without them!