Flukers Ultra Deluxe Premium Heat Mat is an easy way to warm up your pets life. This durable under-tank heater provides uniform, evenly distributed warmth and may be used in or outside the terrarium. Provides uniform, evenly distributed heatMay be used inside or outside terrariumsSafe for all reptiles and amphibiansThe Premium Heat Mat is easy to use and built to last. It generates a constant 100°F and is safe for all reptiles and amphibians. Choose the size that best fits your pets habitat. Important: Read ALL instructions BEFORE using your Heat Mat. Specifications:Mini: 2 Watts - 4" x 5" - (Mini Tanks)Small: 7 Watts - 6" x 11" - (10-20 Gallon Tanks)Medium: 12 Watts - 11" x 11" - (20-30 Gallon Tanks)Large: 20 Watts - 11" x 17" - (30-40 Gallon Tanks)Jumbo: 35 Watts - 11" x 29" - (50+ Gallon Tanks)