817 Optocoupler 8-Channel Photoelectric Isolation Controller Board for Arduino Module


Specification:

FAQ

1. What is the terms of payment?

L/C,D/A,D/P,T/T,Western Union,MoneyGram

2. What is the delivery time?

Normally, 1-5 workdays after payment;
Special requirement orders, delivery time is negotiable.

3. If the products can't work after receiving it,what should I do?

We will replace new items for you at once, and respect your final decision for wrong goods.

4. If the products don't meet my demand after I received it,can I return it?

Yes,no problem.You can return back to us, we will refund your full payment.

5. what is the warranty?

1-2 years warranty according to different products.
1-3 months to replace new items for free.
All products are tested strictly for 2-3 times before leaving factory. we have earned very good reputation in quality,Certified by the ISO9001.