Technically, the use of amateur segments without sufficient knowledge will cause interference to others without knowing themselves. Legally, it may be confiscated by confiscated equipment and fines, causing serious consequences (which may be caused by your own unknown). If it violates the National S......
Read MoreCan. First of all, you should have at least one country -free intercom (409MHz, 0.5W transmitting power, 20 channels). The distance between the connection in the city is about 500 meters, and the suburbs can reach one to three kilometers for entryment. Then, you can consider taking the license to us......
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