Earmor M32 MOD4 active tactical headset with communication microphone, electronic hearing protection, and TP-120/U-174 connection for compatible PTTs. The M32 MOD4 is designed for users seeking an active hearing protection solution with radio communication, depending on the configuration used. Brand: Earmor Model: M32 MOD4 Type: Active tactical headset with communication Protection: Reduction of hazardous noises greater than 82 dB Attenuation: NRR 22 dB (as per product data) Connection: TP-120/U-174 PTT: Compatible (depending on model, wiring, and standard) Microphone: Detachable, adjustable, and usable on the right or left (depending on version) Earpads: Foam (as per standard version) Power Supply: 2 AAA batteries Battery Life: Approximately 350 hours (as per product data) Auto Power Off: Approximately 4 hours (as per product data) Mounting: Headband, H-mount, or X-mount (depending on configuration) Use: Shooting, training, communication, tactical equipment A compatible PTT is required for radio use. Compatibility depends on the radio, wiring, connector, and connection standard used.