Wireless dual VHF Microphone Studiomaster BR21

Wireless dual VHF Microphone Model No. Studiomaster BR21R 21 SeriesThe Studiomaster Professional BR 21 is a compact & lightweightDuet Wireless Microphone System with two transmitters & one non-diversity receiver.FeaturesVHF Band frequency Quartz Lock Control.Operating Frequency Range:180-270MHz.Dual Channel Non-Diversity Receiver.Output: Balanced XLR / Unbalanced 1/4″ phone jack.Frequency Response : 50Hz – 15kHzTransmitter Battery Type: 9 V Alkaline Batteries, 6-8 HoursModels:   -2 x Handheld (BR 21 / BM 11 BM 11).   -2 x Lapel (BR 21 / BL 11 BL 11).   -1 Handheld & 1 Lapel (BR 21 / BM 11 BL 11).Specification:Overall Carrier Frequency Range180-270 MHz, VHF high bandFrequency Stability 0.005%Modulation ModeFMMaximum Deviation Range 15KHzFrequency Response50Hz – 15 KHzS/N Ratio>100dBAudio Dynamic Range>100dBT.H.D. (Total Harmonic Distortion)<1%ReceiverReceiving SystemFixed frequency by quartz controlReceiving Sensitivity60dBPower SupplyDC 12-15V 150mAAudio Output Level0~0.5V/5K ohmsTransmitterRF Power Output30mWSpurious EmissionsOver 45dB Carrier WaveAntennaBuilt inMicrophone ElementUnidirectional Dynamic MicrophoneCurrent ConsumptionAbout 25mAPower Requirements9V Alkaline BatteryBattery Life6-8 hrs Continuous Operation