SM1P Features SENS Technology Enhances speech while suppressing background noise to a safe level. Hearing Protection Up to 36dB NRR 360° Situational Awareness Complete omnidirectional awareness of surrounding hazards and alerts. Electronic Volume Limiter Limit ‘in-ear’ exposure to 82 dB(A). Communication Solutions Bluetooth Communication Bluetooth cellular connection for conversation and audio streaming. Two-Way Radio Communication Clear two-way radio communication in high-noise environments. Short-Range Communication Improved Short-Range (SR) with VOX capabilities and additional channel banks. Face-to-Face Communication Clear and effective communication in the loudest environments. Headset Form Style Headband Noise reduction rating of 27db NRR Behind-the-Neck Noise reduction rating of 24db NRR Helmet Mount Noise reduction rating of 23db NRR SM1P-IS SM1P-ISDP Buying Options Buying Options Customer Reviews 3.9 out of 5 stars 5 3.9 out of 5 stars 5 SENS Technology ✓ ✓ 360° Situational Awareness ✓ ✓ Electronic Volume Limiter (82 dBA) ✓ ✓ Noise-Cancelling Boom Mic ✓ ✓ Two-Way Radio Cable Connection ✓ ✓ Bluetooth Connection ✓ ✓ FM Short-Range with VOX (8 Channels) ✓ ✓ Face-to-Face Communication (Quad Mics) ✓ ✓ Intrinsic Safety (UL/TIA/CSA) ✓ ✓ Double Protection (Earmuffs + Earplugs) no data ✓