Product description Premium in all the right points. The Plantronics EncorePro 500 headphone series is a new generation of headphones for customer service centers and offices, designed for the future and built on the experience. The three innovative models offer greater comfort to be worn all day, superior noise cancellation for clearer calls and greater reliability to continue conversations without worries. Keep an ear on the customer and one on the collaboration Plantronics EncorePro 510 is the new generation of our most popular over-the-head monoaural headphones. Completely reconsidered for the needs of modern customer service centers and offices, the HW510 headset is equipped with soft bearings for comfort that lasts all day, metal joints that guarantee durability and reliability and a flexible microphone with visual and tactile positioning guides for precise positioning and clearer conversations. Immersive focus to improve customer interactions The Plantronics EncorePro 520 is the bi-nautical version of the brand new HW510 design, which covers both ears to ensure greater concentration by blocking background noise. The HW520 is also equipped with soft bearings for comfort that lasts all day, metal joints that guarantee durability and reliability and a flexible microphone with visual positioning guides and touches for precise positioning and clearer conversations. Technical specifications Ports and interfaces Connectivity technology Cabling Performance Recommended Use Office/Calling Center Product type Headphones Product color Black Headphone type Binaural Headband Microphone Type Arm microphone Microphone Frequency 15 - 6800 Hz Microphone sensitivity 3300 ? Microphone input impedance