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Normally, the distance between long distance alarm system and alarm accessories is 1500 meters, however, the distance is an ideal distance. It is valid under the condition that there are no obstacles between alarm system and alarm accessories. If there are a lot of abstacles between them, the signal distance will be shortened. At that time, you need to use our high power FM antenna. Notice: please install the antenna as high as possible, so that it can¡¯t be blocked by buildings. So the signal transmitting distance can reach more than 1800 meters.
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