SY271(Display card) . Can store 120 characters . LED color can be chosen. 7x21 number of LED. Power supply by car. Input by infrared ray Technical Specification Size 310x160(mm)Weight 25g (absence battery)Display Display Area: 120x25(mm)Matrix: 7x21 Number of LED: 147Feature -Can store 1 message, total 120 characters; -With 7 levels of speed to display-Controller can store 4 messagesData communication Input by infrared rayPower Supply By carLED color Red, Blue, Green, Yellow, White, Pink, Three Colors Mixed