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Detailed Specifications: SYSTEM Range up to 150 feet, depending on environment and transmission conditions, including obstructions and other RF sources RF Power 94 dBµ V/m at 3 m, complies with the Federal Communications Commission (FCC) Part 15 Carrier Frequency 912 -- 915MHz; Channel 1: 912.900MHz; Channel 2: 913.800MHz; Channel 3: 914.400 MHz Modulation FM Frequency Response 100 -- 15,000Hz Dynamic Range More than 78dB Output Level -55.2, ±4 dBm (0 dBm = 1 mW/Pa, 1,000Hz) Output Impedance 1 kohm TRANSMITTER Microphone Directivity Omni-Directional Maximum Sound Pressure Level more than 114dB SPL Microphone Cord Length Approx. 39" (1 meter) Oscillator Crystal Controlled Signal Processing Compressor Antenna Built-in Power Requirements DC 1.5V, requires AA battery (not supplied) Battery Life Approximately 20 hours with Sony Alkaline battery Mic Input Stereo minijack with plug-in power RECEIVER Antenna Built-in Oscillator SAW resonator Signal Processing Expander Monitor Output Level Approx. 2 mW, 16 ohms Earphone Jack Monaural mini plug Mix Mixing Jack Monaural mini plug Output Cord Length Approx. 18" (450mm) Output Plug Monaural miniplug Earphone Cord Length Approx. 18" (45cm) Power Requirements DC 1.5V, requires AA battery (not supplied) Battery Life Approximately 20 hours with Sony Alkaline battery
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