Code: Audiphones Transducer: 40 mm Frequency response: 20 Hz – 20 kHz Impedance: 32 ohm Sensitivity: 107 dB to 1 kHz SPL 30 mW/1 cm Cable length: 2 m Microphone Microphone pickup pattern: Cardioid (unidirectional) Type: Electret Condensor Back Size: 4 mm Frequency response: 100 Hz