RDO II roll-up garage door motor is a 24V DC high-torque motor, operating so quietly you’ll need to look at the door just to be sure that it’s moving. With an RDO II not even power outages can close you down. Its reliable battery backup will keep you coming and going like there’s no tomorrow. All this opening and closing had better be safe and secure. Utilizing CENTURION’s ultra-secure code-hopping remote controls, and coupled with its anti-crushing sensitivity , the RDO II has you covered.