The Plantronics EncorePro HW520 is a headset that has been specially developed for business-intensive telephone users. It is suitable for connecting to a PC or desk phone. Due to the lightweight design of only 74 grams, you will hardly notice that you are wearing a headset. The headband and microphone are adjustable with a ratchet system and the soft foam ear cushions ensure a high wearing comfort. The sound quality is not inferior to the wearing comfort. This EncorePro headset is equipped with various functions, such as HD audio and Noise Cancelling, which ensure an excellent audio experience. SoundGuard technology protects your hearing by attenuating sudden sound peaks. And thanks to the adjustable noise-cancelling microphone, you can always be heard even in busy call centers. Note: The connection cable for your phone or computer is not included.