Product name: Lenovo headset E08 USB Frequency Response: 20Hz-20KHz Speaker size: 050mm Speaker Sensitivity: 110 dB at 1kHz 1mW Maximum Power: 20mW Rated power: 10mW Microphone Type: Omni-directional Microphone size: 06.0*5.0MM Microphone Sensitivity: -38$2dB Microphone frequency response: 100Hz-8KHZ Transmission interface: USB Wire length: 2.0m 10mm Headphone weight: 270g=5g Size: 220 x 180 x 105 mm Execution standard:GB 9254-2021