Key features: UHF transmission in SMD technology 4 available frequencies operating in the ISM band Intuitive user interface Ideal working distance 30m (in open area) Dynamic microphone with a cardioid pattern System: Operating frequency: UHF 863-865MHz Available frequencies: 863.05 MHz, 864.15 MHz, 863.55 MHz, 865.00 MHz (WF-U11HA - 863.05 MHz) Frequency stabilization: Automatic calibration Dynamic Range: >90dB THD: 95dB Selectivity: >80dB Sensitivity: 10dBuV Outputs: balanced 400mV; unbalanced 400mV Dimensions: 211 x 43 x 115mm (without antennas) Antenna: 120mm Weight: 0.295 kg Microphone: Power: 10mW Modulation type: FM Battery: 3V (2x1.5V AA) Battery life: 5 hours Dimensions: Ø33 (min) - Ø48 (max) x 240 mm Weight: 0.218 kg (with batteries)