WARRANTY: WE OFFER 30DAYS MONEY BACK GUARANTEE AND TWO YEARS WARRANTY for the corded telephone headset with mic, professionally designed for Call Center, Telemarketing, Office, Business, Phone sales, IT Department, Customer Services, Consulting and more. GREAT DURABLE: The Hands-free wired RJ9 headset with tough design, strong headband, quality plastics, superior microphone and speaker allows for 24/7 heavy use in offices, call centers and homes. Reinforced cord of the communication headset is built with Kevlar to withstand office chair wheels, sharp objects, can rival with Jabra headset for heavy use. SUPER COMFORTABLE: Light weight design call center headset with adjustable headband fits for different head sizes. Soft protein leatherette ear cushion, skin-friendly, durable and very easy to clean, with 180°rotatable earpieces ensures the customer service headset to bring all-day long comfort wearing. HD AUDIO SOUND: Office headset with wideband speaker delivers crystal clear sound for easy communication. With unidirectional noise canceling microphone, the telephone headset can block out unwanted background noises for the other end callers to hear clearly, perfect for use in noisy environment. COMPATIBILITY: Beebang phone headsets with noise cancelling microphone work for Aastra Mitel ShoreTel Allworx NEC Aspire Dterm Nortel Digium Toshiba. Many of these phone brands require headset with microphone ampilification, which can be fulfilled by this model headset.