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报警手表英国有一种报时报警两用手表,它配有一根可以伸缩的微型天线和—个超微型无线电发射器。戴表人外出遇到意外时,只要拔出天线拉杆,触动按钮,设置在家中或警察局的接收器就会立即闪烁红灯报警,同时还能标出呼救者的方位。报警链美国市场上推出一种防盗报警链。这种链条可以安装在大门或窗户上,如遇盗贼撬门,链下的—个装置就会发出刺耳的报警声,使盗贼
Alarm watch Britain has a watch alarm dual-use watch, it is equipped with a retractable micro-antenna and a micro-radio transmitter. Wear a watchman to go out accident, just pull out the antenna lever, touch the button, set at home or police station receiver will flash red light alarm immediately, but also marked the salvage position. Alarm Chain The United States launched a burglar alarm chain on the market. This chain can be installed in the door or window, in case of thieves breaking the door, the chain - a device will be issued a piercing alarm sound, so that thieves