Display: Display Area:48*10(mm) Matrix:5*19 Number of LED:95 Feature:-Can store 1 message,total 120 characters -With 7 levels of speed to display,and 7 levels of luminance for adjust by user Data communication: Easily input by hand Power Supply:One CR2032 or two CR2016 batteries LED colour: Red ,Blue,Green,Yellow,White,Pink,Three Colours Mixed Operation time:About 20 hours