Power source: 220 - 240 V, 50-60 HZ. Power: 200 W. Fully submersible aquarium heater suitable for aquariums from 50 to 200 W. Temperature scale: The compact underwater analog aquarium heater can be adjusted between 16 ° C and 32 ° C. Maintains constant and stable temperatures for your fish. Liters: 50. Temperature range: 20 - 34 ° C. Dimensions: 37 cm.