David Clark Voice PA AwardsHeadset H5040 Is intended to be used in noisy environments (180-250 dB) headset. Recommended for noise levels up to 100 dBSoft, adjustable overhead strapFits under safety helmetFoam filled ear seals provide outstanding comfort and secure fit 30-inch straight cord and single plug, electrical connectorNSN: 5965012822106The MSHA Approval Number 9B-67
