This Omnidirectional Microphone offers a 500 uA current rating, 4.5V operating supply voltage, and -42dB sensitivity. Omnidirectional microphones can receive sound coming at all angles. Features & Specs * Directional Properties: Omnidirectional * Impedance: 2.2 kOhms * Current Rating: 500 uA * Sensitivity: - 42 dB * Termination Style: Solder Pin * Diameter: 9.7 mm * Depth: 4.5 mm * Operating Supply Voltage: 4.5 V