Frequency range : 2.4 GHZ Frequency response : 20 Hz - 20 KHz (+- 3 dB) Output impedance : 2200 ohms Pairing method : Automatic Microphone type Condenser Microphone directivity: Unidirectional Microphone diameter : 9.7 x 5.2 mm (0.4 x 0.2") Microphone sensitivity : - 47 dB (+- 2dB) Signal to noise ration : > 63 dB Power supply : Rechargeable lithium battery Power consumption : < 70 mA at 0 dBm Operating voltage : 2.0 - 10 V DC Operational distance : 25 metres (82 feet) Operational time : Up to 6 hours Included : 6.35 mm (1/4") audio adapter plug, microphone clamp, windscreens and double charger cord الحالة جديد