PRO-SW4000XL Automatic Gate Opener for Swing Gate up to 20-Foot and 1000-Pound Designed for Swing gates up to 20 ft. long and 1000 lbs. Features GTO/Access Systems' true soft start and stop operation. Open and close times from 18 seconds. Full systems capable, single/dual control board includes an adjustable obstruction sensing, gate sequencing and auto close settings. Dual applications require the 2nd operator arm PRO-SW4200XL