The Sonetics APX379 wireless headset protects you from dangerous noise levels while enhancing all other audio to a comfortable listening level. Take calls, listen to music and integrate with a two-way radio simultaneously via wired and wireless Bluetooth inputs. Extend team communication up to 1,600 feet (line-of-sight) Stereo Listen-Through protects your hearing when you need to hear warnings and alarms or have a face-to-face conversation. Engineered and tested for rugged durability in extreme environments, the APX379 improves team communication no matter where you work.