Stay aware and protected with ISOtunes PRO Aware 2.0. With Aware Technology™, this headset offers ANSI-rated 26 dB NRR and SafeMax OSHA-compliant 85 dB volume limit. Enjoy 24 hours of Aware only, or 15 hours with Bluetooth. This durable headset is IP67 water/dust proof, with reinforced wires to withstand physical stress and a TPU controller engineered to withstand exposure to solvents. Experience crystal clear sound from the custom-tuned full-range dynamic drivers.