This base is Zero Clearance capabilities (no legs needed) and can be used in poster beds, sleigh beds and RV's also comes in Split Queen sizes 30" x 80".    
 
ADJUSTABLE BASE FEATURES 
 
Full Range Positions — Head/Foot Up & Down
Upper Body Incline up to 60 degrees
Lower Body Incline up to 40 degrees
German Engineered Motor (Stand-by Mode is Ultra-Energy Efficient)
Stand-by Mode is Ultra-Energy Efficient
Strong Angle Iron and Steel Tubular Frame Construction
Safety Plus™ Features (Emergency Power Down)
Upscale Dark Charcoal Upholstery Fabric
Clam Shell Hinged 3” Solid Top Deck Design
Recessed 3-in-1 Legs Allow for Heights of 8”, 11.5” and 15”
Massage Technology with 10/20 and 30 minute timers with wave technology 
4 Easy Access USB Ports ((2) USB-A and (2) USB-C ports)
2 Programmable Memory Positions
3 Preprogrammed Positions: Zero Gravity, Anti-Snore, and Flat
Under-bed Lighting
Controllable via the Bluetooth App
Wireless Ergonomic Remote Control (Easy Access Pairing Button)
Platform Friendly with Multifunction Bracket Accessory, Sold Separately
Designed to Fit Within Most Standard Bedroom Sets
Weight Capacity: 800 lb Total Weight Capacity*
 Heart health - Sleeping with your body at a 120-degree angle eases pressure on the heart, allowing it to pump blood more easily. The result is better blood flow and enhanced heart health
The Bases can sit flat without the legs (meaning it can be placed on a sleigh, poster or platform bed) - great feature for RV's too.