The product adopts steel or aluminum alloy shell, strong and durable. The shell have rust and durable characteristics.Special white plastic curtain, can improve the effect of watching. Images, text and data shows excellent results. Equipped with self-locking device, can stay at any position. Without power, hand pull ring can lift control.Our product is suitable to play all kinds of video format.Humanized design is more convenient for the use of your daily life.