About This Thermostatic Control Bird Bath Heaters: you will receive 2 packs 250W bird bath heaters with heat dissipation and temperature control, designed for outdoor use; They prevent water from freezing in winter and provide a reliable solution for keeping your bird friends hydrated with warm water during the winter; Note: please ensure there is enough water to completely cover the birdbath de-icer Thermostatically Controlled Heating: our birdbath de-icer features an 8.66-inch diameter flower-shaped disc, offering a larger heating area and higher heating power; Equipped with advanced thermostatic control, it automatically activates to melt ice and snow, ensuring your bird bath remains ice-free even in harsh winter conditions Automatic Shut off Design: the thermostatic control bird bath heater features an automatic shut-off function to stop overheating, enhancing the safety of your pets and livestock while bathing or drinking warm water; Our extended 6.6-foot cord is long enough for you to place it in more places Waterproof and Durable: this birdbath deicer is made of quality materials with a seamless edge and sealed mouth, providing double protection; It's well-sealed, waterproof, and durable, effectively protecting your birds and other animals from burns, allowing them to enjoy warm water during the winter, keeping your garden vibrant even in the coldest of winters Easy to Use: our bird bath heater is easy to install and energy-efficient; There's no assembly or spare parts required; Simply plug it into a power source, allowing you to continuously provide warm drinking water for poultry and livestock without excessive energy costs; It's suitable for a variety of outdoor settings, including farms, backyards, patios, and gardens, and is an ideal choice for waterers, duck ponds, and cattle drinking stations