Frequency channels:A.88.3 88.5 88.7 88.9MHz OR B.107.3 107.5 107.7 107.9MHz Frequency stability: ?0ppm(-10癈～+50癈) Modulation Mode: +/-75kHz Widebandth Syntonic preference: ≤ -60dB Transmit Distance: 5-15m Distortion Factor: ≤3% (F=75kHz, f=1kHz) Signal-to-Noise: ≥45dB(1KHz 100%) Input Voltage: 3V