1, Roll up door openers 2, 24V DC motor drive unit 3, Rolling code technology 4, Safety auto-Reverse 5, Manual ... Conversion Roll up door openers1, Inpout Voltage : AC230/110V selectable2, Motor Type : ... unit,distance is shorter than 50meters open site9, Security : Rolling code technology ,Super heterodye ASK modulation10,control box : stand ...