With the continuous improvement of living standards, people's anti-theft concept is also constantly strengthened, so the use of door and window alarms are also more and more widely used. Door and window alarms, as the name suggests, are alarm devices installed on doors and windows for anti-theft alarm. If an unknown person opens the door and window in the house, it will send out a sharp alarm, which will remind the occupants of illegal intruders and will also play a deterrent role against illegal intruders. Then, how much is the door and window alarm one ? What are the characteristics of the door and window alarm? Let's follow Xiaobian together to understand it. 
How much is a door and window alarm
The price of door and window alarms is definitely different from the functions, effects and brands.
1. With the wide use of door and window alarms, there are more and more types and prices are diversified. There are no less than ten or twenty dollars of products.
2. Door and window alarms with more functions and better effects, the price is concentrated in hundreds or even thousands.
3. When choosing door and window alarms, it is best to choose regular manufacturers and brand awareness, because such products will have more quality protection. 
4. We are now the most commonly used and highest-selling door and window alarm, and the price is concentrated in the range of 300 to 600 yuan.
With regard to how much money a door and window alarm , Xiao Bian introduced here. I believe we all have a general understanding of the price of door alarms. In fact, the price of the siren is mainly related to the features it has and the popularity of the brand, so the above price is only for reference.
Several characteristics of door and window alarm
1. The typical anti-theft system for door and window alarms consists of a host, multiple detectors, and a remote controller, which is wirelessly controlled. The detector is equipped with an infrared sensor, magnetic door and so on. Infrared probes are used to detect the movement of the human body, while door magnetism is used to sense the opening and closing of doors and windows. 
2. Household door and window burglar alarms are equipped with remote controls. So you can arm and disarm your home situation.
3. The interior of door and window burglar alarms has a high-capacity rechargeable battery, so if the blackout occurs, it can still work for more than 36 hours.
4. Door and window burglar alarms are generally wirelessly transmitted using a gsm mobile phone card, thus avoiding wiring troubles. In the case of an artificially broken telephone line, the alarm can also be dialed by a neighboring alarm. 
Editor's summary: The above is the introduction of several features of Xiaobian about the number of door and window alarms and the characteristics of door and window alarms. By reading this article, everyone should have a better understanding of the price and characteristics of door and window alarms.
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