... the screws on the angle of product to open the front panel to insert the pictures ) 2. Light ... malls, bookstores, bars, nightclubs, supermarkets, window display, to promote new items or discount items.2. Festivals, ... warning.4. It also can be used to draw pictures to develop children's creativity. Included :1 ... don't know how do I to go to preventive maintenance and light boxes, to decrease the service ...