Ergonomic designed to support and promote proper posture in the lower back with built-in vibrating motors to give you muscle relief. Heated Massage Lumbar Cushion Ergonomically designed to provide back support, the Heated Massage Lumbar Cushion offers: Heat, Massage, and Lumbar support in one compact and easy to use cushion. Quick List of Features * Controller Built-in * Heat Therapy * Vibrating Massage * Lumbar Support * AC Powered (Optional Accessory) * DC Powered * High-Density Foam