... 3.RF,DC5V,2AUX OUT 4.wireless,bluetooth 2.4G audio transmitter receiver Specification: frequency response45Hz-20KHzusing frequency2402-2480MHzsensitivity89dB±2dBaudio sampling rate32KHzDistortion ... , classroom and conference room.6. Selectable wireless MIC:1090, 1060bluetooth audio transmitter receiverSpecificationBluetooth specification: Bluetooth V2.1/V1.2Function range: 15 metersFrequency ...