SPK:Ф40MylarspeakerImpedance:32±15%OhmSensitivity:105±4dBEffectiveFreq.Band:20Hz-20KHzRatedinputpower:10mWMax.inputpower:50mWMIC:Ф6.0X5.0mmSensitivity:-52±2dBat4.5V,2.2KΩ(0dB=1V/Pa,1KHz)Directivity:OmnidirectionalEffectiveFreq.Band:20Hz-20KHzMax.operationvoltage:10VStandardoperationvoltage:4.5V