Technical specifications .Transmitter 1.Operating frequency:720-880MHz 2.Adopt CPU control 3.With PLL combined technology 4.With 32 channels for free selection and LED display 5.Frequency stability :+/-0.002% 6.With FM max frequency adjusting: +/-45KHz 7.Pre-warning display for weak battery 8.Audio frequency response compression and auto electricity level circuit Receiver 1.Operating frequency: 720-880MHz 2.Adopt CPU control 3.With PLL combined technology 4.With 32 channels for free selection and LED display 5.Frequency stability: +/-0.002% 6.Noise locked +Pilot tone locked 7.Audio frequency response expand and auto electricity level control circuit 8.True diversity receiver