... adopts security monitoring and alarm,Responding to airport, station, bank, hospital, and public places where monitoring and information real-time ... , Numerical range: 0-7, respectively, black, blue, red, green, blue, magenta, yellow and white(2) the letter size: 3 # ... the letters is black, and background is yellow),(4) screen clearingExample: 123456 # 1 # 1 # (no letter on screen,and the background of ...