Hatco Insulated Built-In Rectangular Heated Wells keep hot food at safe serving temperatures longer. The fully insulated construction retains heat better, distributing it more evenly to keep a variety of foods hot and fresh. Includes a separate lighted ON/OFF rocker switch and temperature dial, allowing preset temperatures to be maintained. Fully insulated wells on sides and bottom ensure better heat retention, and cooler surrounding surfaces for customer safety. Faster preheat and recovery improves energy efficiency.