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About product and suppliers:
        Alibaba.com offers 342,455 signal products. About 14% of these are auto lighting system, 1% are traffic light, and 1% are sensors. 

A wide variety of signal options are available to you, such as firecracker & fireworks, low voltage, and combination switch. You can also choose from emergency, camping, and industrial. As well as from construction, underground. And whether signal is ip65, ip55, or ip68. 

There are 340,181 signal suppliers, mainly located in Asia. The top supplying countries or regions are China, Taiwan, China, and Uzbekistan, which supply 98%, 1%, and 1% of signal respectively. 

Signal products are most popular in North America, Eastern Europe, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 89,245 with ISO9001, 35,292 with Other, and 12,954 with ISO14001 certification.