Whisper motors by Hunter Douglas bring quiet power, versatile controls, and reliability to a selection of energy-efficient roller shades, shadings, and other window coverings. The motor is designed to provide exceptional performance for a complete range of commercial applications from single rooms, offices, and A/V spaces to building-wide automation. Standard motors can operate shades up to 240 inches wide and 144 inches high. http://www.hunterdouglascontract.com/home/