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About product and suppliers:
            3,859 door alarm products are offered for sale by suppliers on Alibaba.com, of which alarm accounts for 26%, sensors accounts for 1%, and software accounts for 1%. 

A wide variety of door alarm options are available to you, such as door, personal. 

There are 3,871 suppliers who sells door alarm on Alibaba.com, mainly located in Asia. The top countries of suppliers are China, Hong Kong S.A.R., and Taiwan, China, from which the percentage of door alarm supply is 98%, 1%, and 1% respectively.