Power Step running boards are triggered by an electronic signal from the vehicle's factory door sensors and extends to a convenient stepping height in one second. The Power Step running boards are powered by a heavy-duty, weatherproof motor. The Power Step is lowered when any door is opened and Power Step retracts when any door is closed. A closed door sends the automatic running board retracting to the neatly concealed pocket behind the vehicles OEM rocker panels, so invisible, you will never even know it was there. All running board components are OEM quality and corrosion-resistant for long service life. The Power Step is designed to operate normally in all weather conditions and is built to handle up to 600 lbs. per side. The Power Step by Bestop running boards are a must have for all truck enthusiasts.