1. FREE-FALL DESIGN Insulating rubber rollers ensure smooth and quiet operation. 2. DUAL MASSAGER UNIT (Optional) Massagers are built into the foundation and are quiet. 3. MAINTENANCE FREE ELECTRIC MOTORS Solid, state-of-the-art construction.   4. HEADBOARD HUGGER MECHANISM (Optional) Keeps the bed next to the nightstand. 5. 100% POLARIZED MODULAR ELECTRICAL SYSTEM No stray wires and the plug-in feature has easy serviceability. 6. ALL STEEL SUPPORT SYSTEM For years of durability and quality performance.