SAFETY CERTIFICATE: ETL Certification Fish Tank Heater, hygger provide the most effective guarantee for your fish tank. Thickened Quartz Protective Glass; Bottom Protective Cover; Stable Suction Cup; Double Seal; Precision Welding; No Leakage Of Insulation
USEFUL FISH HEATER: hygger submersible aquarium heater, 2mm thick glass tube, heat conduction is more even, anti-collision, explosion-proof and corrosion-resistant, dual-purpose for betta freshwater and saltwater. The high-efficiency heating wires have a large area and are arranged tightly to increase the heating area and transfer the heat evenly
TEMP SETTING GUIDELINE: DO: Rotate left and right to adjust the temperature, easy to adjust, the temp range of aquarium fish tank water heater is 68℉~92℉. SEE: temperature scale setting guide bar. Working indicator light, plug in the power, the working state is more intuitive

Beep Alarm, Fault Prompt: Our nano aquarium heater has safety features such as low water level shutdown and overheat protection. When the temp control system detects a malfunction in the equipment, it will give an error code alarm and stop heating to prevent any potential damage or injury. Note: Although the system will automatically turn off the power when a malfunction occurs, residual heat in the heating rod may melt the shell. Please handle it as soon as possible
Black Look & Mini Size To Hide Easily: The 50-watt Betta heater with a 4″ long x 1″ high heating element design takes up very little space, which could effortlessly fit into 5-10 gallon small aquariums and is also suited for shallow water turtle tanks
Adjustable Temperature Control: hygger mini submersible heater includes an external thermostatic temperature controller, you can easily set the temperature by cycling between 59 and 93 degrees, and the digital display makes for intuitive viewing of real-time water temperature. Once the heater is on, an indicator light will tell you whether it is in heating mode or on standby