Quantity 2 Split Cal King bases are needed for a set.

An upgraded sleep experience with Lumbar Support, Quiet Mode®, USB ports, Massage and Underbed Lighting

Redesigned by our in-house sleep experts, the TEMPUR-Ergo® power base is better than ever. Four factory preset positions instantly move the base. Based on ergonomic research, factory presets adjust your body to optimal relaxing and zero-gravity positions. Unwind with a soothing two-zone massage, one zone at the head and one zone at the feet, with three levels of intensity. Advanced features like USB ports, underbed lighting, zero-gravity presets, and virtually unlimited head and foot lift positions will help you optimize your sleeping environment.