The Programmable Top Drive Roller Apparatus features an Omron controller and brushless motor and holds 53 roller bottles (maximum 120 mm diameter). Battery backup models have a battery level indicator and provide up to 18 hours of continuous battery operation (dependent upon rpm and load) in the event of motor failure. The speed range is 0.08 to 4.0 rpm with a rotational switch for reversing direction. All position drive is standard and the power cord is detachable at both ends. Optional motion alarm accessory is available and is factory installed.