Q Audio QWM1900HS Headset B-Stock. UHF wireless headset microphone system PLL system with multi-channel receiver and built-in ACT system. Uses future proof frequencies Channel 70 frequency band 863 – 865MHz Auto frequency scanning SMT technology Preset 16 channel PLL system Frequency stabilisation. 100dB Total harmonic distortion. 100dB Image & spurious rejection: >80dB Border upon channel […]... Read More