VGA Signal Generator

Product Dimensions: 6.2 x 4.8 cm 

Input voltage: DC 5V (  input charging voltage via MICRO USB. It is familiar with most adapters of smart phone now, also called USB V8 interface, so you can also use power bank to provide power for it)

Output Interface: DB25 VGA Prot 
Resolutions: 640 * 480, 800 * 600, 1024 * 768, 1280 * 1024 
Image: ( can produce eight kinds of different images, which are the color striped screen, gray degree distribution platform ladder, all white, all black, all red, all green, all blue, all gray) 
With these functions, you can test the basic situation of the screen or TV as long as they are with the VGA interface. 
For example: LCD panel highlights, dark spots, the presence and distribution of dead pixels. 
Two KEY function:
PIX= switch picture
RES= switch frequency and resolution