Specification Material: Aluminum Alloy Voltage: 110v, 50Hz Power/Single Arm: 50w 24VDC Motor Running Speed: 1.6cm/s(0.63inch/s) Motor Stroke: 38.5cm/15.16inch Maximum Door Load: 300kg/661.39lbs Operating Conditions: -22? 700lb Electric Automatic Heavy Duty Gate Opener Dual ARM Swing+2 Remote Controls.Multiple Modes: It has four modes to choose from, which are automatic, normally open, common, and half-open state. Motor Running Speed: 1.6cm/s(0.63inch/s). Motor Stroke: 38.5cm/15.16inch. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Garage Doors & Openers\Opener Systems". The seller is "lightupulife" and is located in this country: US. This item can be shipped to United States.