제조사 Knowles 분류 Microphones Current Rating 50 uA Depth 2.21 mm Diameter 1.4 mm Directional Properties Unidirectional Impedance 4.4 kOhms IP Rating - Length 3.57 mm Operating Supply Voltage 1.3 V Sensitivity 3 dB Termination Style SMD/SMT Width 3.57 mm