... program your own message advertising use 1.English display supported. 2.Holds 6 messages(Up to 1500 Characters). 3. ... the back of the unit. 5. Closed Back Design (with rear cover kit).6. Connect with 12V power. (By 12V cable ... ) 7.Indoor application, such as car,company, bar, exhibition, club, cinema, hotel etc, LED car indoor scrolling display screen