The Presto HeatDish Plus parabolic electric heater uses a computer-designed parabolic reflector to focus heat, like a satellite dish concentrates TV signals It feels three times warmer than 1,500 watt heaters, yet uses a third less energy and will feel the heat directly and instantly Includes 1 HeatDishes Infinite Switch technology: provides a virtually infinite choice of heat settings, allowing you to select with precision the level of warmth desired Combines Tip-over switch protection with a warning buzzer that sounds if the heater is jarred or tipped while the heating element is energized