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About product and suppliers:
        Alibaba.com offers 33 proximity warning system products. About 30% of these are alarm. 

A wide variety of proximity warning system options are available to you, such as door, auto. 

There are 31 proximity warning system suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and Taiwan, which supply 74%, 9%, and 6% of proximity warning system respectively. 

Proximity warning system products are most popular in Southeast Asia, North America, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 7 with ISO9001, 4 with Other certification.
        
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