Size:80x30x7(mm) Weight:25g(absence battery) Display:Display Area: 70x17(mm) Matrix: 7x21 Number of LED: 147 Feature:Can store 6 messages (1 can store 512 characters,2-6 can store 256 characters) -With 9 levels of speed to display, and 9 levels of luminance for adjust by user Data communication:Easily input by hand Power Supply:One CR2032 or two CR2016 battery LED colour:Red, Blue, Green, Yellow, White, Pink, Three Colours Mixed Operation time:About 20 hours