Microphone type: CapacitanceDisplay screen: NoneWireless: YesPointing features: all pointing/no pointingWith or without a stent: YesImpedance: 2.2 or less KRFrequency response: 100K-1 6KHZSensitivity: -58dB 3dB,Impedance: ≤2.2KRFrequency response: 100K-1 6KHZSensitivity:--58dB ± 3dBSignal to noise ratio: 60dBDirectivity: OmnidirectionalPlug specifications: 3.5 standard socketSensitivity reduction:--3dBat 1.5VCable length: 2.5MWorking voltage: 5V