&lt;b&gt;Premium in all the right places.&lt;/b&gt;&lt;br /&gt;&lt;br /&gt;The Plantronics EncorePro 500 headset series is an all-new generation of headsets for customer service centers and offices designed for the future and built on experience. Three innovative models deliver greater comfort for all-day wearing superior noise-canceling for clearer calls and increased reliability so conversations can continue without worry. And theyll help you meet the OSHA / Noise at Work regulations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Keep one ear on the customer and one on collaboration&lt;/b&gt;&lt;br /&gt;&lt;br /&gt;The Plantronics EncorePro 510 is the next generation of our most popular over-the-head monaural headset. Completely re-imagined for the demands of the modern customer service center and office the HW510 has soft ear cushions for all-day wearing comfort metal joints that deliver durability and reliability and a flexible mic with visual and tactile positioning guides for precise positioning and clearer conversations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Immersive focus for improved customer interactions&lt;/b&gt;&lt;br /&gt;&lt;br /&gt;The Plantronics EncorePro 520 is the binaural version of the all-new HW510 design covering both ears to provide greater focus and concentration by blocking background noise. The HW520 also has soft ear cushions for all-day wearing comfort metal joints that deliver durability and reliability and a flexible mic with visual and tactile positioning guides for precise positioning and clearer conversations.