Freesea 25/50/100/200/300 W calentador de acuario con termómetro sumergible para acuario25 Watt Heater This Aquarium heater is suitable for 1 to 5 gallons aquariums, Length 6. 8 inch,voltage 110 120V, power cord is 4. 0 ft, please choose the right wattage aquarium heater according to our size chart. Temperature range: 63F~95F , It is very easy to adjust the temperature you need, we also deliberately give each customer a free diving thermometer, you can observe the water temperature of the fish tank at any time. Intelligent temperature