Adjustable Aquarium Heater, 25w-300w, Fish Tank Thermostat, 110v-220v. Elevate Your Aquarium with Our High-performance Heater, Designed for Maximum Efficiency and Safety. This Versatile Heater Suits a Variety of Tank Sizes, Providing Precise Temperature Control from 20°C to 34°C, Ideal for Both Freshwater and Saltwater Environments. Engineered with a Precise Temperature Regulator and Over-temperature Protection, It Guarantees Reliable Performance. Its Durable, Explosion-proof Quartz Glass Construction Offers Outstanding Heat Resistance. The Heater Also Includes a Sturdy Hook and Suction Cup for Secure Placement in Your Tank. Fully Submersible with Double Waterproof Protection, It Ensures Precise Control at Depths of Up to 120cm, Making It Perfect for Diverse Aquatic Settings. Features: - Available in Wattages: 25W, 50W, 100W, 200W, 300W - Temperature Control Range: 20°C to 34°C - Explosion-proof Quartz Glass Construction - Over-temperature Protection - High Thermal Conductivity for Efficient Heating - Fully Submersible with Double Waterproofing - Suitable for Depths Up to 120cm - Operates at 220V-240V and 50Hz-60Hz - Compatible with Freshwater and Saltwater Tanks Ensure the Safety and Comfort of Your Aquatic Life with This Reliable Aquarium Heater .