Desk phone headset with an USB type A plug. Note: doesnʼt include box not instruction manual. You can download the {contact info removed} Better sound If youʼre in a busy environment, you need great sound to hear the voice of your customer. Additionally, when youʼre concentrating on work, you want that HIFI sound for music. The Jabra Biz 2400 is great@both. HD voice technology makes sure you clearly understand the other party The speakers reduce ambient noise, so you can focus on the call Specially designed “air shock” noise-cancelling mic filters out sharp breathing sounds and popping noises often heard in conversations.