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metal detector: security wand, [1](1s)：single beep, airport;[2](1s)：two quick beeps, airport;[3](5s)：long constant tone, airport下载 收藏其他(other) / 金属探测器(metal detector)x1倍举报
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metal detector: security wand, [1](1s)：turning unit on or off beep, airport;[2](1s)：short warbled tone, airport;[3](2s)：warbled tone, airport下载 收藏其他(other) / 金属探测器(metal detector)x1倍举报
