500 Watts (Size 40 to 65 Gallon) Aquarium Stainless Steel Submersible Heater/ Temperature Range 16~32'c (60&deg;f and 90&deg;f.) Easy to attach on aquarium tank wall with 2 suction cups Temperature range: 16~32'C (60~90'F), Suitable for aquariums up to 125 gallons Fully submersible, Adjustable Temperature control. Double insulation & waterproof Stainless steel and glass design is anti-rust, useful and durable, Material: Stainless Steel Delivery time: By Airmail: Generally, delivery to USA takes about 12-15 days