Now, you can enjoy the customized comfort of an adjustable base at Serta's most affordable prices ever. The new motion air™ model lets you adjust the head and/or foot of the mattress with a wireless remote so you can find your optimal position for sleep, work or relaxation in bed. Features: Adjustable Box Spring: Not Required Manufacturer Warranty: 10 Year Limited Bed Size: Twin Xl Measurements: 79.5 Length/Inches, 12 Depth/Inches, 37.5 Width/Inches Maximum Weight Limit: 650 Lbs Assembly: Assembly Required Base Material: 100% Metal Care: Spot Clean Country of Origin: Made in US Visit our Furniture & Mattress Customer Care Center for delivery options, protection plans and other services. Problem with an order or need help with a return? Our Furniture & Mattress Customer Service agents will be happy to help. Give us a call at 1-800-442-7902 Don’t forget to print off your delivery checklist to avoid any delays or issues when delivering your item. IMPORTANT: Split King and Cal. King foundations (two foundations lengthwise side by side) are made up of two pieces. You must select a quantity of 2 Twin XL/King or 2 California King for a complete split foundation set.