2.5mm Jack Call Center Headset, BizoeRade Noise Cancelling Binaural Headphone with Mic and Cable for Office Office DECT Phone,Most Cordless Phones Wide Application -- Designed for use with any cordless phone with a standard 2.5-millimeter jack; Boom-style microphone adjustable for optimum level. Hearing Protection Technology -- The microphone noise abatement can reach the aviation noise reduction level; Helical headphone cable which will avoid damaging during the use. Comfortable To Wear -- made of the flexible metal hose with the positioning accuracy MIC + Structural Design + Durable. The Best Call Quality -- Around 10,000 times Testing, the microphone boom rotates, 330 degree adjustable boom; Helical headphone cable which will avoid damaging during the use. Compatible Models -- Headsets for phone sales, telephone counseling services, insurance, hospitals, banks, telecom operators, enterprises etc. 12 months Worry-Free Warranty and Lifetime friendly customer service for this headset.we will provide 100% refund or replacement to you.