AQQA Small Aquarium Heater,Submersible Fish Tank Heater Adjustable Temperature,Mini Short Dual-use Fish Heater with LED Digital Display Thermostat,Saltwater Freshwater Price: $16.99$29.99 (as of 23/02/2024 17:06 PST- Details)

🌡️【Dual Purpose Multifunctional Quartz heater】Usage 1: Use with protective shell,Usage 2: Single quartz tube body,The shell is equipped with 2 strong suction cups, and the tube body is equipped with a tube body suction cup,A protective shell can prevent burns, and not using a protective shell can reduce space occupation.
🌡️【Dual Digital Display External Controller】The controller functions include displaying real-time water temperature and set temperature simultaneously. The button can set the temperature to 59 ℉ -94 ℉/15 ℃ -34 ℃. The LED indicator light is red, indicating that heating is in progress, and the blue light indicates that the set temperature has been reached.Long press the button for 8s, and the Fahrenheit and Celsius readings can be converted to each other.
🌡️【Out of Water Power Off】When the heater leaves the water surface by more than 1.5 inches, the heating rod automatically loses power, and the digital controller displays error code E1. The error code automatically recovers when heater are submerged in the water.

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