Jabra BIZ 2400 Duo USB UC. Refurbished Includes 90 Days Warranty. . Product # 2499-829-105. . The Jabra BIZ 2400 Stereo NC USB Headset features a noise cancelling capabilities eliminating unwanted background noise. This professional corded stereo headset is for PC-based IP telephony that delivers Hi-Fi audio quality with multimedia applications. It also has a break-proof FreeSpin boom with 360?degree rotation. The headset is optimized for microsoft office communicator and also connects mobile phone through bluetooth connection. It is designed for special requirements in contact center and office environments. . . The BIZ 2400 Stereo NC USB Headset features a cascade of improvements pushing the envelope for the levels of audio quality, comfort and durability. Hand made Neodymium speakers provide maximum frequency response, resulting in greater call clarity, fewer misunderstandings and better all-around customer service. For its maximum reliabilty and durability, key details are made of surgical steel and the cord is re-inforced with Kevlar. . . BIZ 2400 Stereo NC USB Headset: . . . . |Noise-Canceling Microphone |Dual Earpiece |Over the Head Headset |FreeSpin Boom w/ 360° Plus Rotation |Ultra Strong Kevlar-Reinforced Cord |Neodymium Speakers. HiFi Sound Quality |Stereo Sound |Bluetooth® Connection for Mobile Phones |USB Connection |Supports Wideband VoIP Phones |Call Answer / End Button