3M Peltor ProTac Shooter Electronic Ear Defenders. Professional-Quality Hearing Protection (26dB NRR) Environmental microphones for level-dependent hearing protection and ambient listening. 3.5 mm listen-only stereo input for connection to external devices (e.g. cell phone, two-way radio, Ipod). Voice guided menu system for ease of use and adjusting settings. Auto power off, the headset will turn off after 4 hrs of non-use to save battery. Low-battery warning to inform you when to change batteries To reduce corrosion caused by sweat and moisture, the electronics are located in a separate compartment of the cup A great value in electronic level-dependent hearing protection, 3M PELTOR is a leading brand in electronic level-dependent hearing protection for professionals who have an occupational exposure to steady state or impulse noise. The ProTac III helps protect workers' hearing and allows them to listen to important ambient sounds (at a maximum level of 82dB), allows them to communicate with colleagues, hear warning signals and approaching hazards, while protecting their hearing. Key Features - Environmental microphones for level-dependent hearing protection and ambient listening 3.5 mm listen only stereo input for connection to external devices (Smartphones, shoulder microphones, etc.) Voice guided menu system Auto power off: The headset will turn off after 4 hrs of non-use to save battery Low-battery warning. To reduce the corrosion caused by sweat and moisture, the electronics are located in the outer part of the cup