Impedance: 32 Ohms±10%Frequency: 20~20K HzSensitivity: 98dB± 3dB at 1K HzMax. Input Power: 20mWInput connection: 3.5mm grade four nickel-plated stereo plugCord Length: 1000mm±30mmMicrophoneSensitivity: -58±3dBFrequency:100-10000HzOperating Voltage:2.5V-10VOperating Current:<500uAImpedance:2K Ohms±10%