Delivering day-long comfort and rugged performance, the Sonetics APX372 headset shields you from dangerous noise levels while enhancing all other audio to comfortable listening levels. Stereo Listen-Through provides situational awareness without sacrificing safety and hearing protection. Connect your cell phone or listen to an MP3 player via the auxiliary input. Monitor portable radio traffic with a direct wire interface. Waterproof and tested to perform in extreme environments, the APX372 protects your hearing while you get the job done. Can be configured to fit overhead, behind head, or on hard hat (adapter sold separately).