Laguna PowerHeat Heated De-Icer for Ponds - 315W De-Icer for ponds whose temperatures are down to 20 degrees Fahrenheit Highly-visible LED pilot light that indicates when unit is on Integrated thermostat shuts off the De-Icer when it overheats, protecting internal components from damage 315 watts. 7 meter (22 feet) electrical cord with grounded plug Aids in gas exchange by keeping ice from forming around heater