A. Has detailed user manuals

B. Professional installation instructors

C. Each product has long term warranty

3. Is there pre-sales or after-sales service?

— One-on-one customer service for the entire process

4.Transportation：

— DHL、UPS、EMS、Fedex、Air freight、Sea freight…

5.Delivery Time

A. Sample Order：1-3 Days

B. Stock Order ：3-7 Days

C. OEM/ODM Order：Depend on quantity

6.What is Star's goal?

A. Saving customer‘s cost

B.Environmental protection

C.Put customer needs at the center

D.Take technology benefit humanity