... /contrastBrightness and contrast of red, green and blue can be adjusted by software,100 scales are available, ... which is responsible for the projects installation instructions, if you required, they can go to you to instruct you ... ratio3, Products series we offer(1)Outdoor fix installation led screen:P10,P12,P14,P16,P20,P25 ... P14,P16,P20,P25 etc. (3)Indoor fix installation led screen:P6,P7.62,P8,P10 etc( ...