The TEMPUR-Ergo® Extend is an essential part of a holistic sleep system. With features including six 12" adjustable legs, under bed lighting, and USB ports, you can have a seamless sleep experience Every night. The wireless remote features one-touch preset buttons and backlit, soft touch function keys so you can easily adjust in the dark. Designed with a zero Gravity preset and child lock feature, the base can elevate your head and feet to closely simulate weightlessness and help take the pressure off your back while you sleep. Quiet mode gently tilts your mattress to an anti-snore position for less nighttime disruption. Please note: a king mattress requires two twin xl foundations (sold separately).