Thermostatic Control and Anti-Freezing: The 30W heated water bowl automatically stops working when heated to 131 F (55 C) and starts when the water temperature drops, ensuring that the water does not freeze even at -4 F, providing drinking water for dogs and other animals outdoors.Larger Capacity: The 0.84 gallon (3.2 L) capacity can meet more drinking needs, and is widely used for stray dogs, stray cats, chickens, ducks, rabbits, squirrels, etc. This makes pet bowl an ideal choice for providing constant water in outdoor environment.Interference Free Design: The heated dog water bowl does not have indicator, which can make small animals nervous, while the no-indicator design helps them approach to the drinking water more relaxed. No on or off switch design prevents animals from accidentally touching and improves safety.Safe and Durable: The pet water heating bowl outdoor is made of premium plastic, eco-friendly and harmless, and won't produce toxic substances after heating