Features: Adopt head mounted ear protections design, with boom microphone, and support intercom calls. Without need drive, insert and play, convenient and fast to use. The headphone control adopts a separate sound card digital chip for processing, and through digital transmission, it provides more professional and prominent processing of sound signal. Comes with 4 button, including sound up, sound down, muted microphone, and muted speaker functions. Equipped with green work indication light and static microphone indication red light. Easy to use and intuitived, with simple operate. Specifications: Material: PU Leather, Plastic Port type: USB2.0 Horn diameter: about Ф35mm Impedance: 32Ω Frequency response: 20Hz-20KHz Sensitivity: 115dB Output power: 41MW Up to output power: 84MW Noise level: ≤-78dBA Dynamic ranges: ≥78dBA Microphone specification: 6x5mm Microphone sensitivity: -52dB Microphone directionality: omnidirectional Microphone impedance: ≤2.2KΩ Microphone frequency response: 50Hz - 15KHz The length of the headphone cable: about 2m/6.56ft Package Includes: 1 Piece USB Corded Headphone note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.