Electro-Voice RE3-HHT Handheld Transmitter, ND76-RC3 Microphone Head, 488-524MHz

Element type:Dynamic neodymium magnet structure Frequency response, close:30 Hz-17 kHz Frequency response, far:70 Hz-17 kHz Polar pattern:Cardioid Sensitivity, open circuit volt at 1 kHz:5.6 mV/Pascal (-45 dBV/Pa) Maximum SPL:135.5 dB SPL (1% THD) Impedance:1000 ohms Power requirements:4-8 VDC Polarity:Positive pressure on diaphragm produces positive voltage at center contact relative to ground contact Electrical contact:3-Ring/3-Pin Threaded coupling:1.25' (31.75mm) diameter28 UN-2A thread pitch Finish:Black polyurethane paint Materials:Aluminum, steel, steel wire grille screen Frequency Oscillation Mode:Phase-locked loop (PLL) Bandwidth limits:5L: 488 - 524 MHz Tuning bandwidth:36 MHz Selectable frequencies:1440 Transmit output power:10 and 50 mW Sync Frequency:Ultrasonic Display By:LCD + LED Function Controls:Power, mute, group, channel, frequency, sensitivity adjustment, RF power, auto off, key lock RF Stability: