2pcs 500w aquarium heater anti-explosion submersible fish tank water adjustable aquaneat fully submersible heaters work in any position (horizontal or vertical) to provide optimum aquarium water temperature. safe and reliable in both fresh and salt water aquariums! temperature range between 65°f and 93°f. sensitive and reliable thermostat maintains uniform temperature includes two suction cups for mounting automatic shut off when the temperature is reached. shatterproof glass plastic cover protector (removable) voltage: 110-120v 60hz power: 500 w recommended tank size: 100 to 166 gallon dimensions: length: 17.625 inch diameter: 0.89inch length of power cord: 3.65 feet includes: 2 pieces of heaters