... Supported: HSP V1.2, HFP V1.5, A2DP V1.2 *RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band*Class2 ... * Advanced multipoint support: enables connection to 2 phones for voice*Frequency Response: 20 Hz - 20 KHz, Very high Signal to Noise ... Ratio(SNR ):95 Db, Total Harmonic Distortion(THD):0.1%,* Frequency Response: 60 Hz - 20 kHz*2W Speaker Output Level: 80dB ...