Energy -saving through double -walled stainless steel design. Energy consumption by 20% lower than with comparable single -walled boilers. Welded, silicone -coated stainless steel handles. With built -in filter tub. No paper filter is necessary for roughly ground coffee. The percolator holds the coffee to serving temperature after the brewing. With a level indicator, non-drip rooster and automatic provision. The control light shows the end of the brewing process and the necessary descaling.