5*7 Red LED Dot Matrix Display Specification: 1) Dots Size: 1.9mm 3. ... ,10.0mm, according to requirements (various dimensions available) 2) Color: red, green, yellow, blue, orange. 3) Characteristics: Long life-span, low ... , ISO certifications 7) Applications: outdoor or indoor using, elevators/lift, led strip display, clock display and other different display areas of ...