Wireless dual VHF Microphone Model No. Studiomaster BR21 R 21 Series The Studiomaster Professional BR 21 is a compact & lightweight Duet Wireless Microphone System with two transmitters & one non-diversity receiver. Features VHF 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 – 15kHz Transmitter Battery Type: 9 V Alkaline Batteries, 6-8 Hours Models: -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 Range 180-270 MHz, VHF high band Frequency Stability 0.005% Modulation Mode FM Maximum Deviation Range 15KHz Frequency Response 50Hz – 15 KHz S/N Ratio >100dB Audio Dynamic Range >100dB T.H.D. (Total Harmonic Distortion) <1% Receiver Receiving System Fixed frequency by quartz control Receiving Sensitivity 60dB Power Supply DC 12-15V 150mA Audio Output Level 0~0.5V/5K ohms Transmitter RF Power Output 30mW Spurious Emissions Over 45dB Carrier Wave Antenna Built in Microphone Element Unidirectional Dynamic Microphone Current Consumption About 25mA Power Requirements 9V Alkaline Battery Battery Life 6-8 hrs Continuous Operation
