Product: PGFUNNY 75W Aquarium Heater, Adjustable LED Digital Temperature Display for Betta Tank Heater with Protective Guard
Brand: PGFUNNY
Color: Black
Aquarium Heater  Fish Tank Submersible Heater Information:*Please fully dive the heater for 10 minutes before using the betta heater to adapt to the water temperature in the fish tank.*The betta fish tank heater is completely sealed so please don't disassemble it, that will make it permanently damaged.* The outer material of the heater is nylon and glass fiber, which has great flame retardant* There are some quartz sands in the glass tube to help heat, Please do not tap the glass tube1. How to set the initial temperature?After pressing the button on the line, the display screen will flash and enter the setting mode. Then you can press the button to the temperature ( temperature range: 68-94℉）needed and then release the button, After 5s, the temperature set will be saved automatically. 2. How to solve the FAQs?★ E1 error: It means the water of the fish tank is lower than the water level switch, or the heater was not put in water totally.☞ Solve plan: Add water or adjust the placement of the heater, to ensure the heater is totally underwater ★ E2 error: It means the temperature of the fish tank is over 98℉.☞ Solve plan: Wait for the water to cool or add water into the fish tank★Inaccurate temperature: Partial heating and the temperature has not spread ☞ Solve plan: Increase water circulation in the tank ★Display Nothing: Poor connection of power supply☞ Solve plan:  Check the power socket and connectionFunctionality :➤Material: Nylon, Glass Fiber, Glass, Quartz sand, smart chip.➤Waterproof: IP68➤Rated operating voltage: 110V - 120V➤Automatic constant temp:68℉ - 94℉ / 20℃ - 34.
【Over-temperature protection】Heater for betta fish has an automatic thermostat function. When the water temperature reaches a specified temperature value, the heater will automatically stop heating; When the water temperature is lower than the set temperature, the heater will automatically start heating. When the temperature is higher than 98℉, the display screen flash, and display E2
【Water shortage protection】During its heating time, the small aquarium heater must be 100% submerged into the water. This heater automatically shut itself off once it removes from water which ensures the safety of your pet fish. when fully in the water again it will return to normal work again. When the water level is lower than the water level switch, the heater rod displays E1 and flash
【Digital Display】With led display on the middle of the heater front side, Long press on fish tank heater switch to switch between Fahrenheit / Celsius display. External temperature setting avoids getting hands wet, digital LED display shows real-time water temperature. The heating temperature ranges from 68 to 94°F.
【Suitable for aquarium pets】: Betta Heater Suitable for all kinds of aquarium pets, betta fish, tropical fish, goldfish, ornamental fish, and turtles, can work in both brine and freshwater. All shapes and materials of betta tank, whether it is glass or plastic, all can be used.
【CE Certification】: The aquarium thermometer made of nylon and glass fiber, sandy quartz filler, and MCH Alumina ceramic heating system, anti-explosion & cracking, flame-retardant, keep your fish from scalding. This product has certificated by CE, ROHS, FCC certifications

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