... 2, 24V DC motor drive unit 3, Rolling code 4, Safety auto-Reverse rolling shutter motor1, Inpout Voltage : AC230/110V selectable2, Motor Type ... each unit,distance is shorter than 50meters open site9, Security : Rolling code technology ,Super heterodye ASK modulation10,control box : stand alone ... power failure18, Waterproof function19, Easy installation20, OEM, ODM is welcomed. rolling shutter motor