1) Miceocomputer control sustem,better anti-jamming,high intelligentization 2) Better protection 3) Warranty:1 year Name: Tubular control system DY-QD01 1.Manual and electric are available,better protection. 2.It control the screen to the setted position follow the sign of smock and fire alarm. 3.Miceocomputer control sustem,better anti-jamming,high intelligentization. Packing :