Driver unit:Φ50mm Speaker sensitivity: 110±3dB Speaker frequency response: 20Hz-20kHz Speaker impedance:32Ω±5% Microphone dimension :Φ6*5MM Microphone sensitivity:-47dB Microphone directivity:Omni directional Microphone impedance:2.2KΩ Microphone Frequency : 100-10KHx Plug type:3.5mm TRRS jack Cord length:2m