... quality wireless speaker and speakerphone,*Support Bluetooth hands-free,* Noise signal ratio: 95dB, high quality sound.* 6th generation CVC for echo ... ,* RF Frequency Range:2.402-2.480GHZ, 2.4G ISM band,* Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm ... Response:20 Hz - 20 KHz, Very high Signal to Noise Ratio(SNR ):95 Db, TotalHarmonic Distortion(THD):0.1%,* Frequency Response:60 ...