Andrea Bluetooth headset with noise cancelling microphone - Military grade noise cancelling microphone! - Noise isolating ear cushions - Compliant Bluetooth v2.1 + EDR - Microphone input 1 channel - Audio output 1 channel - Continuous talk time up to 6.5 hours - Charging time < 3 hours - RF frequency range 2.4 GHz - Operation range 10 meter - Audio frequency range 100-3600Hz - THD+N -80dB - Noise cancellation 4dB/Octave - THD+N -80dB speaker output - Audio frequency response 100-3500 Hz BT201
