This electronic kit requires assembly and allows you to create your own moving message. Features include a 35 led graphic display of up to 16 characters, adjustable scrolling speed, programmable standby/run. PCB board size is 46/89 x 67mm (1.8"/3.5" x 2.6"). It operates on 9V to 12 volts DC can be operated in automotive applications. A 9V battery may be added for 'battery backup' of message. This is a kit and requires full assembly. Our kits are only returnable if they are still in their original packaging. Alltronics Part# MK124.