Frequency Range VHF:136-174MHz UHF:400-520MHz(Dual band) Memory Channel 128 Group Channel Spacing 25KHz(Wide)、12.5K(Narrow) Operating Voltage DC7.4V Frequency Stability ±2.5ppm Operating Temperature -20~+60℃ Antenna Impedance 50Ω Transmit Current H≤2.5A;M≤1.8A;L≤1.1A Modulation(Wide/Narrow) 16KΦF3E/11KΦF3E Maximum deviation ≤±5 kHz/≤±2.5 kHz (W/N) Stray Power ≤7.5uW Adjacent Channel power ≤-65dB/≤-60dB Signal-to-noise(wide/narrow) ≥-45dB/≥-40dB QT/DQT Deviatio(wide/narrow) 0.7±0.1KHz/0.4±0.1KHz Modulation Sensitivity 8-12mV Demission 135*65*38mm(no including the antenna) Weight About 300g(include in battery and antenna)