Hygger Aquarium Heater,500W/800W/1200W Submersible Fish Tank Water Heater Double Quartz Explosion-Proof With For Freshwater Saltwater Tank

Fully submersible: The heater is fully submersible. Please note, The heater should be fully submerged to work properly Rapid thermal accumulation: The heating rod is made of explosion-proof quartz glass material and a high-temperature resistant nickel-chromium heating wire with silicon carbide heat conduction; which result in faster water heating and a safer, more durable, long-lasting heater. Build-in intelligent LED digital temperature display: LED digital display screen shows the current and preset water temperature. The external hand controller makes for easy setting and operation. Every press changes the set temperature by 1?. The led flashes 5 seconds and then stops, indicating that the temperature has been set and the display shows the current temperature.