Using DefenderShield® Headphones
Select from the multiple size rubber earbuds (Small, Medium, and Large) provided to find the right size. Proper fit should be comfortable, but have a secure fit in the outer ear canal. A medium size earbud comes attached.
Squeeze the microphone body once to answer the phone call. Squeeze again for 2 seconds to end the phone call.
Squeeze the microphone body once to mute. Squeeze it again to resume two-way communication.
The frequency on the DefenderShield EMF Radiation-Free Air Tube Headphones is 50 Hz-10,000 Hz.