All of the garage door motor are good quality within TUV,SGS,BV,CE certifications ,Force including 500N,600N,800N,1200N,1500N,1800N , can be used for door size max. 25 square meters . Quiet chain or Belt drive operation. Available terminal for photo cell, wall switch, battery back up. Offering 1 pc for MOQ. 5 Years Warranty.