Using the polaris models from plantronics you can easily and cost effectively add hands free efficiency to phone systems that already have built in amplifiers and volume controls just plug in the polaris headset and you39re ready to take full advantage of your phone system39s built in headset amplification and controls like all plantronics39 products the polaris models deliver no compromise audio quality and ease of use polaris models let you get the most out of the built in capabi