On/Off Switch will function on Phones that support this feature. The detachable Ear Loop rotates 360 degrees and can be used on either the left or the right ear gold plated 2.5mm pin.
Features
* Clear sound: patent protected technology provides high quality audio even under windy outdoor conditions and traffic noise
* Universal compatibility: works with 2.5mm jack phones
* Comfort: flexible boom microphone is easily positioned as desired
* Functionality: voice activation, redial & call waiting on supported phones
