Jetsu Submersible Aquarium Heater - Glass 300-watt, for Freshwater Aquarium and Saltwater Aquarium, 12 Month Guarantee, New Range of Aquarium Supplies FULLY SUBMERSIBLE AQUARIUM HEATERS: 300W 110V-120V 50/60Hz Strong Quartz Glass Aquarium Fish Tank Heater, perfect for Freshwater and Saltwater Aquariums. Includes 150cm cable for easy use TEMPERATURE SCALE: Can be adjusted between 20C~34C (65F~93F). Suitable for aquariums up to 60-75 gallons. Includes a TEMPERATURE CONVERSION TABLE. Maintain constant and stable temperatures for your aquatic creatures. 1 YEAR WARRANTY: We believe in great customer service, if your heater breaksdown we will replace it CLEAR INSTRUCTIONS: Written in English. EASILY CLEANED AND MAINTAINED: simple to use