[Smart Constant Temperature: Keep your pets warm and cozy with our PTC thermal thermostat. The heater produces heat at a constant temperature with a range of 80-88¡ãF on "Low" and 98-102¡ãF on "High". Auto ON/OFF with ambient temperature will make sure your fur babies always feel comfortable during the harsh winter "Designed for Your Pets: We designed our heater special for your pets. The steel spring protects the power cord from pet chewing while the power switch is located on the cord away from the machine and covered with rubberized waterproof protection. The removable hair barrier mesh blocks pet hair and dust. Plus the working noise is less than 45dB to ensure it wont disturb your pets rest" Energy-Saving: Not affected by the outside air temperature our PTC thermostatic system saves you more on electricity bills every year by having higher heat conversion efficiency in low-temperature environments. Making it a smarter and more energy-efficient choice 4-Step Protection: With four-step control including PTC thermostatic resistors smart temperature controllers temperature sensors and high-temperature fuses our heater ensures maximum safety and prevents electric heating tube redness scalding and fire Larger Heating Area: Our heater can effectively heat up to 150 square feet in low 300W/High 600W power output. This makes it perfect for all kinds of small animal houses such as dog houses chicken coops and rabbit cages]