1) Helps increase circulation and relax tired muscles.2) No lubrication necessary - Motors are permanently lubricated.3) Mattress stays even with base giving total neck, head and shoulder support.4) Durable Plywood and Steel Base Platform.5) The backbone of our adjustable Unit is built to last.6) Mattress Retainer- keeps mattress in place during adjustments.7) Whisper Quiet Dual AC Motor System- Allows individual position adjustments without disturbing the other sleeper.8) Head and Foot lift Motor- Independent control; UL list and IECEE Certified.