Product Description Safety never sounded so good as with the new safety works digital ear muffs. These MP3 FM/AM Radio ear muffs allow you to listen to your favorite music while safely blocking out the noise on the job. They have been tested by a third party lab and meet OSHA requirements for noise reduction they have also been checked to ensure that the radio MP3 player volume does not exceed a safe level. So go ahead and drill, mow, or saw with confidence your hearing is protected. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. Safety never sounded so good as with the new safety works digital ear muffs. These MP3 FM/AM Radio ear muffs allow you to listen to your favorite music while safely blocking out the noise on the job. They have been tested by a third party lab and meet OSHA requirements for noise reduction they have also been checked to ensure that the radio MP3 player volume does not exceed a safe level. So go ahead and drill, mow, or saw with confidence your hearing is protected. From the Manufacturer Safety never sounded so good as with the new safety works digital ear muffs. These MP3 FM/AM Radio ear muffs allow you to listen to your favorite music while safely blocking out the noise on the job. They have been tested by a third party lab and meet OSHA requirements for noise reduction they have also been checked to ensure that the radio MP3 player volume does not exceed a safe level. So go ahead and drill, mow, or saw with confidence your hearing is protected.