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About product and suppliers:
            1,410 usb relay control products are offered for sale by suppliers on Alibaba.com, of which switches accounts for 11%, relays accounts for 9%, and remote control accounts for 2%. 

A wide variety of usb relay control options are available to you, such as protective, general purpose, and auto. You can also choose from low power usb relay control, as well as from subminiature usb relay control, and whether usb relay control is voltage relay, electromagnetic relay, or time relay. 

There are 1,399 suppliers who sells usb relay control on Alibaba.com, mainly located in Asia. The top countries of suppliers are China, Hong Kong S.A.R., from which the percentage of usb relay control supply is 99%, 1% respectively.