... base (motor base) is made up by plastic coating treatment in order to be more lasting and looking and not easy ... : Max Door Weight 400kg 5, Torque : 7 Nm6, Back up battery : built in7, Door Speed : 16m/min8, Interruption limit: spring or magnetic9 ... dB10, Reduce ratio : 30110, Working temperature: >-45 ºC; >+65 ºC11, Built-in control logic board12, 433MHZ/315MHZ Remote control ,100meters open site13 ...