The invention provides an electronic product having a double-PCB sandwich structure, comprising a PCB assembly and a casing having an open side, wherein a protuberance is respectively formed on the inner sides of two side walls of the casing in the longitudinal direction, the PCB assembly consists of an electronic component, a base PCB and a main PCB, the length of the base PCB and the length of the main PCB in the longitudinal direction of the casing are substantially equal to each other and slightly smaller than the length of the casing so that the PCB assembly can be installed into the casing by mating with the protuberances.
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