Display: Display Aera:76x37(mm)  

Matrix: 21*7 

Number of LED: 147

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 batteriesv