Detailed Product Description LED billboard,LED DISPLAY ,LED SCREEN,led ... 120° working voltage: 110V 220V Life span:100000hoursIn a limited space plane, can be transfered unlimited messages ... display. Switch can be set for time. Own a clock function, can be displayed the time. Can ... symbols, time, temperature, messages such as animation. using a security low-voltage DC5V, low heat productivity, low power ...