The MM-SL2000B slide gate opener is ideal for slide gates weighing up to 1000 lbs. and up to 30ft. in length (or a 20 foot opening). This model is ideal for light commercial and residential slide gate applications. The control board includes adjustable obstruction sensing, gate sequencing and Auto Close settings (0-120 seconds). UL rated for Class I, II, III. U.S.A.