... the screws on the angle of product to open the front panel to insert the pictures ) 2. Light source--Use SMD 3528 white ... é, retail stores, shopping malls, bookstores, bars, nightclubs, supermarkets, window display, to promote new items or discount items.2. Festivals, holidays and ... notice or warning.4. It also can be used to draw pictures to develop children's creativity.Advantage :1. The hd display ...