Micro không dây cầm tay Vicboss P-3200H : 2CHWIRELESS MICROPHONE SYSTEMFrequency Preparation: Crystal Type (Singular Frequency)Carrier Frequency Range: 217.250~225.000MhzSensitivity: -90dB [S/N : 10dB]Frequency Stability: ± 0.002%T.H.D: Audio Dynamic ...