This Buckle can store 6 messages (1 can store 512 characters, 2-6 can store 256 characters), only one can displayed each time It can display: Number:0-9; Letter:A-Z; 23 Signs,for example:Smily face;#!%^&( ) ...etc The power supply for product is CR2032. You can adjust the move speed (1-9) You can adjust luminance (1-9) Size : 5.50" X 2.00"