SUPRAPLUS KEY FEATURES | Mission-critical reliability and comfort.SupraPlus not only meets or exceeds all specifications set by our existing world-class professional headsets, but this headset also delivers superior all-day, every-day comfort and reliability.Ultra noise-cancelling microphone. Noise cancelling microphone with extended boom cuts out more than half of all background noise ensuring excellent transmission clarity in busy, noisy environments.Excellent audio quality. Extended frequency response improves intelligibility. Comfortable, lightweight design.Adjustable headband and foam ear cushions create a stable, comfortable fit. Bendable click-stop microphone boom.Stays in position for clearer voice transmission.Small, light, flexible cable.Designed for lightweight durability, with a single-cable design. Manufacturer: HP Inc. Manufacturer Part Number: 7W074AAAC3. Brand Name: Poly. Product Line: SupraPlus. Product Model: HW261N-DC. Product Name: SupraPlus HW261N-DC Headset. Product Type: Headset. [Technical Information] Connectivity Technology: Wired. Sound Mode: Stereo. Impedance: 125 Ohm. Minimum Frequency Response: 100 Hz. Maximum Frequency Response: 10 kHz. Features: Comfortable. Bendable Microphone. Lightweight. Flexible Cable. Adjustable Headband. Durable. [Earpiece] Earpiece Design: On-ear. Earpiece Type: Binaural. [Microphone] Microphone Technology: Noise Cancelling. Electret. Microphone Design: Boom. Integrated Microphone: Yes. [Physical Characteristics] Ear Cushion Material: Foam. Form Factor: Ear-cup. [Warranty] Limited Warranty: 2 Year.