Feature: 1. FEATURES: The aquarium heater has a power of 300 watts, a voltage of 110‑120V, and is equipped with a removable shield and 2 suction cups. It is easy to hide it in an acrylic or glass water tank. 2. ADJUSTABLE TEMPERATURE: The temperature can be adjusted between 20‑34°C and 68‑94°C. You can freely adjust the temperature setting to allow complete control of the water temperature within a 2 degree difference. 3. EXPLOSION PROOF: Made of impact resistant quartz glass, double sealed shell, explosion proof, no leakage, to prevent your pet from being scalded. Can be used in freshwater and salt water aquariums. 4. LED TEMPERATURE DISPLAY: It displays real time water temperature and set temperature at the same time, which is more convenient than split thermometer. When the water temperature is lower than the set temperature, it will automatically heat up, and stop heating when it reaches the set temperature. 5. SIMPLE AND QUICK INSTALLATION: Place the heater vertically or horizontally so that it is completely immersed in water, and then turn on the power. And install it near the flowing water area to avoid uneven heating. Specification: Item Type: Fish Tank Heating Rod Product Material: Plastic + Quartz Glass Product Size: Approx. 36.5cm / 14.4in Voltage: American Plug 110V-120V Waterproof Rating: IP68 Power: 300W Temperature Control Range: 20-34°C, 68-94°F Suitable For Water Tank: 120-150L Applicable Fish Tank Size: Approx. 80-100cm / 31.5-39.4in. Package List: 1 x Heater1 x English Manual Note: 1. Please allow 1‑2cm error for manual measurement.2. Please allow an error of 2 degrees.3. If the product is completely submerged in the water and still displays E1, the heating rod needs to be re‑based.1. When the adding rod is not powered on, put the heating rod in the water, press the temperature controller with one hand and hold it down, connect the power with the other hand, and release the button after powering on. At this time, the LED display number has been changing, and short press again Press the key once.2. Lift the heating rod out of the water, short press the button once again to complete the calibration, put it in the water, and the heating rod will return to normal working status. (3 seconds) In order to use this product reasonably, the best service period is one year! Exceeding it will easily lead to slow heating and material aging! Please replace it in time!