... 2002, and mainly manufacture garage door openers, rolling door openers, sliding gate openers and door components.100% of our products ... -20~55 RELATIVE HUMIDITY: <90% MOTOR SPEC: Motor Type Permanent Magnet D.C. Motor Voltage 24V DC Torque 150 kg.cm ... Of Door Openers:CE Certificates: Garage door operator,CE/ROHS chain drive section garage door opener ,Sectional garage door opener,door motor,roll up ...