Quality Control
Quality control(QC) is a process that is used to ensure a certain level of quality in a product or service. 
Zhengdian company have a professional QC team who focus on testing led writing board and observing services for more than 8 years. Our led advertising board are chosen and examined at random. The goal of our quality control team is to identify products that do not meet ourcompany's and consumers' specified standards of quality. 
Believe us, believe Zhengdian, dependable, satisfactory, safe and fiscally sound products will be provided!
Quality Inspection:
All products have to go through 4 checks in the whole process: Incoming Quality Control, In process Quality Control, Final Quality Control and Outgoing Q.C.

Material of led light strip

Led strip waiting for inspection

Pick out the unqualified products

Quality inspection of power adapter

One by one test

Qualified power adapter

Power adaptors waiting for check

Checking is going

Qualified Power Adaptors

Inspection about the flashing effect

Inspection of ABS frame

Inspection about the acrylic panel
Product Catalog