3.5 mm listen-only stereo input for connection to external devices (e.g. cell phone, two-way radio, IPod)
Auto power off, the headset will turn off after 4 hrs of non-use to save battery
Environmental microphones for level-dependent hearing protection and ambient listening
Low-battery warning to inform you when to change batteries
Occupational use only
To reduce corrosion caused by sweat and moisture, the electronics are located in a separate compartment of the cup
Voice-guided menu system for ease of use and adjusting settings
