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An alarm clock is a clock to awaken people from their sleep so that they can get up at the time they want. Basic alarm clock use sound for its purpose, some use vibration. More advanced alarm clocks has a sensor to sense whether the person is still in sleep.
Usually, most alarm clocks will stop alarming after a sufficiently extended period of time, usually that is when the person is not there anymore. You can also use the alarm clock features in your watches and mobile phones. Customers can either buy digital alarm clocks which can play different sounds, or a traditional battery-powered alarm clocks which has a fix set of sounds and vibration features. Relatively newer alarm clocks can sing, laugh, or speak the sounds of natures.
alarm clock is one of the most important products sold on FooNar, with 170845 item count.