Features: Professional H132R Call Center headsets with two Mode Noise Cancellation (20-40dB reductions) and Universal RJ9/QD connectors for Clear Communication. Features ABS construction, 330° rotating ear cushions with memory foam, and adjustable metal headband for day comfort in high volumes environment. for call center agents, customer service representatives, and remote professionals requiring uninterrupted voice claritys during extended shifts. Optimized for busy office environment, technical support hubs, and home offices needing noise filtering performances in 150Hz-6800Hz voice frequency ranges. Boasts 300° swiveling antihumidity microphones with precise directional positioning, ensuring accurate voice pickup while maintaining full compatibility with mainstream telephony systems. Specifications: Product material: ABS material Horn diameter: Ф40mm Speaker impedance: 32Ω Speaker frequency response: 20Hz - 20KHz Speaker sensitivity: 115dB rateds output power: 41MW output power: 84MW Noise level: ≤-78dBA Dynamic ranges: ≥78 dBA distortions rate THD: ≤0.1% stereos crosstalk: ≤-52 dBA microphones specifications: 6x5mm microphones sensitivity: -52dB microphones directionality: omnidirectional microphones impedance: ≤2.2KΩ microphones frequency response: 50Hz - 15KHz The length of the headphone cable: about 2M Package Includes: 1PC Office Headphones note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.