Omnidirectional mini mic insert. Ideal for all those miniature circuits. Only 6mm diameter. Specifications: - Operating Voltage 1.5 to 15V DC - Current Consump. 0.5mA or less (6V supply) - Frequency Range 40 -10,000Hz - Output Impedance Same as load resistance (150 ohm - 5k ohm) - Sensitivity 66dB ±3dB - S/N Ratio More than 40dB - Size: 3.5mm x 6mm dia