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A closer look at the Adjustable Base | 4.0 Pro
The 4.0 Pro Adjustable Base is built for those who want it all. Experience ultimate comfort with pillow tilt, adjustable lumbar support, full-body massage modes, and underbed lighting — all controlled by a backlit wireless remote. With heavy-duty lift power and customizable leg heights, it’s our most advanced base yet.

Intuitive Remote Control
Navigate your comfort effortlessly with a sleek, wireless backlit remote. Save up to four of your favorite positions and adjust everything — from head to feet to pillow tilt and lumbar — with one-touch simplicity.

Relaxing, Quiet Massage
Melt away stress with multi-mode massage that targets both upper and lower body. Choose from solid, wave, or pulse settings with variable speeds and intensities for soothing, full-body relaxation right from your bed.

Enhanced Pillow Tilt
Fine-tune your head lift with precision. Pillow tilt adds an extra pivot point near the top of the base for improved support under your neck and head — ideal for reading, TV, or extra neck relief.

Adjustable Lumbar Support
Support where it matters most. A built-in lumbar bar lifts up to 5 inches to provide firm, targeted support to your lower back — great for back and stomach sleepers alike.

Underbed Lighting
Soft-glow underbed lights gently illuminate your space, making late-night movement safer and more comfortable without disturbing your sleep environment.

Customizable Height
Our three-in-one leg design includes 3", 4", and 6" segments for height options up to 13". Whether you want a lower profile or maximum clearance, you’re in control.
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Frequently Asked Questions
Do Mattress King products come with a warranty?
Do you offer financing options?
Is there a return or trial policy for the adjustable base?
Do I need a boxspring or foundation for my mattress?
How do adjustable beds work?
What mattresses are compatible with adjustable beds?
Can I use a bed frame or headboard with an adjustable base?
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