The current auto guard products have some disadvantages such as high false alarm rate, inconvenience of installation and maintaining, sound and light pollution and high price.
市场上现有的汽车防盗产品都有着这样那样的缺点，诸如：误报率高、安装不便、维护不便、声光污染和价格昂贵等缺点。
Flameproof and Intrinsically Safe sound and light production device will not voice signals to the environment pollution.
矿用隔爆兼本安型声光语音信号器的生产不会给环境带来污染。
The sound environmental quality of the most urban area is placed in better and light pollution appearances;
城市区域声环境质量主要处于较好和轻度污染状态；
The sound environmental quality of the most urban area is placed in better and light pollution appearances;
城市区域声环境质量主要处于较好和轻度污染状态；
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