3M PELTOR ProTac III Noise Control Earmuffs MT13H220A

Country of origin: Sweden It has a Level Dependent Function that controls the sound heard inside according to the external noise level. It is battery operated and runs on 2 AA batteries. Comes with an automatic power off function (power off after 4 hours of non-use). Equipped with low power warning function. Equipped with a 3.5mm jack, you can listen to audio by connecting it to a radio or mobile phone (cord not included). NRR value: 21dB Compliant with ANSI S3.19-1974 headband type