Plantronics Encore Pro HW520 is an all new generation headset. Perfect for customer service centers and offices. Has superior noise-canceling technology, soft ear cushions and adjustable fit for all day wearing comfort, metal joints for durability and reliability, and a flexible boom mic with visual and tactile positioning guides for precise positioning and clearer voice clarity. It's Innovative, stylish design also has quick disconnect convenience.. With the RJ9 Adapter Cord, you can use the headset with compatible Plantronics amplifiers or phones with compatible headset port. The adapter cord allows you to easily retrofit any H-series headset with quick disconnect feature. Features: Binaural wearing style Flexible boom allows optimal positioning Superior noise-canceling Aircraft-grade aluminum joints Laser-welded construction Visual and tactile positioning guides Adjustable fit Compatibility with all Plantronics USB, desk phone audio processors, and direct connect cables Helps meet the OSHA/Noise at Work regulations 2 Year Warranty Feature Details Brand Plantronics Warranty Two year warranty Color Black Weight (lbs) 0.9 Battery operated? No