boxtech Small Fish Tank Heater – Mini Aquarium Heater, 50w Submersible Turtle Heater with Adjustable Temperature External Controller for 3 to 12 Gallon Betta Aquarium Tanks

About this item ??? ???? ???????? ??????: Small tank heater fits 3-12 gallon aquarium with 5.35ft power cord. Temperature can be accurately adjusted from 68 to 93°F. Ideal for use in low water level turtle tanks, fish tanks, betta tanks etc. ??????????? ??? ??? ??????? ??????????: Intelligent induction unit with auto memory function, can be safer for you and your fish. Fault code: E1 – Anti-dry protection, E2 – Overheating protection. Take the heater out of the water and put it back in when the error code appears. ??? ??????? ??????? ??? ???????? ??????????? ??????????: Digital temperature display can easily see real temperature and error code. External controller can let you adjust the temperature you want without getting your hands wet. ??????-?????? ??? ???? ???????: Thickened explosion proof quartz tube design, safety and durability. Designed with metal-ceramic heaters are energy efficient and will maintain a constant aquarium water temperature after 72 hours of continuous heating. ???????: Press and hold for 3 seconds to toggle between °C and °F. Do not bury the heater in sand or mud; immerse the heater vertically in fish tanks and horizontally in turtle tanks.