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USB to serial CH340 converter data transmission module USB to RS485 adapter without cable

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FAQ

Q: Are you trading company or manufacturer ?

A: We are manufacturer.

Q: Do you provide samples ? is it free or extra ?
A: Yes, there's sample charge

Q: What is your terms of payment ?
A: T/T, Credit card, Paypal, West Union

Q: Can I design new products by myself?

A: Yes, we can customize new products and new design for you.

Q: How can we guarantee our products quality?
A: The quality warranty is one year.


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