Microphone

*Product model: iK phone microphone
*Microphones size: 6.5 * 5.0 mm
*Acuity: -31 db + / - 3 db
*Orientation: the whole point
*Resistance: resistance or less 2.2 ohms
*Operating voltage: 1.5 V - 2 V
*Efficiency: 20-1600 hz
*The plug diameter: 3.5 MM