HeadphoneDriver: 50 mmFrequency response: 20 Hz-20 KHzImpedance: 39 Ohms (passive), 5k Ohms (active)Sensitivity: 107 +/-3dBMicrophone (Boom)Microphone Pickup pattern: Cardioid (Unidirectional)Size: 6 mmFrequency response: 100 Hz–20 KHz