True graded wireless dual-receiver gooseneck microphone

Receiver Parameters ---Number of Channels: Dual channelPanel Display: LCD screen displays working channel, operating frequency, signal strength, and current battery levelCarrier Frequency Band: UHF 640MHz-690MHzModulation Method: Wideband Frequency Modulation (FM)Oscillation Method: Phase-Locked Loop (PLL) frequency synthesisFrequency Stability: ±0.005%Number of Channels: 200Bandwidth: 50MHzFrequency Interval: 125kHzMaximum Frequency Deviation: ±70kHzSensitivity: S/N 80dB at 6dBv inputDistortion: ≤0.3%@1kHzSignal-to-Noise Ratio: 108dBFrequency Response: 65Hz-18kHz ±3dBVolume Adjustment: Output level can be freely adjustedMute Control: Independent dual mute control with "audio code and noise lock" featureOutput Jacks: XLR balanced and 6.3mm unbalanced jacksReception Distance: Approximately 100 meters (open area)Power Supply: DC 1000mA 12VConference Unit ParametersOperating Power: 2 AA batteriesOperating Current: ≤100mASensitivity: -43dB ±2dBVoice Communication: UHF wireless (one-way communication)Frequency Range: 580MHz -- 690MHzBandwidth: 30MHzRF Power Output: 20mWBattery Consumption: <200mAMaximum Modulation: 60KRadiated Power: ≤9dBmFrequency Deviation: <0.002Reference Speaking Distance: 10cm -- 50cmOperating Temperature: -10℃ -- 45℃System Data Control Communication IndicatorsCommunication Method: UHF wireless (one-way communication)Modulation Method: FSKRadiated Power: ≤10dBmFrequency Deviation: <0.002