On the first power-on and if the ZENEC device was separated from power, I cannot find a radio station?

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On the first power-on and if the ZENEC device was separated from power, I cannot find a radio station?

AW: Right after the first power-on process and after separation from the vehicle battery, the Z-N966 will perform an automatic radio station search. Depending on the vehicle location and the frequency band to be scanned, the search process can take up to 2.5 minutes. During the search period, radio stations cannot be accessed nor  selected by the user.