U-90 parameters:

System specification frequency range: 640MHz--690MHz,

Adjustable channel number: 100X2 = 200,

Oscillation mode: PLL frequency synthesis,

Frequency stability: ± 10ppm.

Transmitter: Frequency range: 640MHz--690MHz,

Adjustable channel number: 100X2 = 200,

Frequency stability: ± 10ppm,

Modulation method: Frequency Modulation (FM),

RF power: 10--30mW,

Audio frequency response: 40--18KHz,

Battery specifications: 2x1.5V AA Size.

Receiver: frequency range, 640MHz--690MHz,

Adjustable channel number: 100X2 = 200,

Receiving method: super heterodyne secondary frequency conversion,

Receiving sensitivity: 100dBm,

Audio frequency response: 40--18KHz,

Distortion: ≤0.5%,

Signal S / N ratio: ≥50dB,

Audio output: balanced output and unbalanced output,

Power specifications: 100-240V 50-60Hz 12VDC (switching power adapter)