Jabra BIZ 2400 II Mono UNC 3-in-1 headset has an Ultra Noise Canceling Mic. The best noise canceling technology available on the market. Jabra Biz 2400 II has built-in acoustic shock protection, extra padding in the headband as well as the only headset with a 360deg swiveling boom mic. When the microphone is close to the mouth of the user, there is a risk of respiratory noise. Jabra Biz 2400 II mono has a microphone is designed with many small holes instead of one larger hole. In addition, foam included on the inside of the microphone, reducing the penetration of air shocks to optimize the call quality. 

Key Features:

• Ultra Noise Canceling Microphone - best noise canceling there is.
• Includes 3 different styles 3 wearing options. This model Includes an ear hook and behind the neck band as well as the over-the-head headband.
• 40% lighter than other similar headsets.
• Larger leatherette ear cushions and increased headband padding.
• HD (wide band) Voice speaker performance and noise cancellation microphone for the caller.
• 360˚ degree rotating almost "unbreakable" boom arm
• Built-in Kevlar-reinforced cables.
• 3 year Jabra warranty

• Requires a Jabra Link 860 amplifier (or GN1200 smart cord) 

For more information, see Jabra Biz 2400 II datasheet