Made of premium tianium tube, covered with protective guard to prevent from scalding and punching, our submersible heater helps create the perfect water condition for your fish to thrive and tanks up to 180 gallons. The exterior temperature button control frees you from getting hands wet and LED digital display is easy to red. Two suction cups for easy installation. <br><br> <b>Features:</b><br> IP68 100% Waterproof, Fully Submersible<br> Dual Protection - Premium tianium material, shatterproof construction; Double sealed material and protective container for scald preventing and anti punching.<br> Accurate temperature control from 70°F to 94°F<br> Thermo Control - This mechanism enables ""running-dry"" protection. The heater will shut off when removed from the water<br> Easy to read LED digital display shows water temperature.<br> Ideal for used in freshwater and saltwater aquariums. <br><br> <b>Specification:</b><br> Item name: Hygger Tianium Fish Tank Heater<br>Model: HG-921<br>Voltage: 110V-120V, 60HZ<br> Power cord length: 4.9 ft<br>Available In:<br>500 Watt, for 60-120 Gallon fish bowl<br>800 Watt, for 120-180 Gallon fish tank<br><br> <b>How to set temperature: </b><br> 1. Place heater inside the aquarium and keeps it fully submerged.<br> 2. Plug in power and you can LED digital number display current water temperature. <br>3. Long press KEY button until will blinks 2 seconds, then presss + or - button to desired temperature. Then display return to current water temperature. <br>4. The heater begins to heating. <br><br> <b>Warm Tips: </b><br> 1. Please read instruction and cautions of package box carefully before use.<br> 2. Always keep heater rod fully submersible .<br> 3. Before take out the heater, please disconnect power and wait for 30 MINUTES to cooling down.<br>4. DO NOT used it at saltwater aquariums or any other corrosive liquid.