This product supercedes Pearlco ceramic heaters which are no longer manufactured. We have taken this opportunity to upgrade the product and give it a modern stylish look. Price remains the same. They are available in 4 different wattages and are a direct replacement in terms of power and function to the old range. Very effective heaters for medium to larger cages with higher temperature requirments. Precautions. Ceramic heaters operate at very high surface temperatures so caution should be exercised. Guard the heater from direct contact by both you and your animals. Use a heater of the correct wattage for the size of cage and the temperature required. A HabiStat pulse proportional thermostat is the recommended controller for this heater.