Aquarium Heater with External Temperature Controller, LED Display for Marine & Fresh Water - Submersible Fish Tank Heater (30-180 Gallon) Review

🐠 Digtal Display & External Controller: Easy to use, LED digital display, adjustable external temperature, can be set between 68°F~94°F, easy to know the real-time temperature. The working status can also be displayed, Red light on: Heating, Blue light on: Constant Temperature. PS: Press one time adds one degree.Long press for three seconds to switch between Celsius (°C) and Fahrenheit(°F). 🐠 Fast Heating Speed & Energy Saving: Under the same conditions, the heating speed is 2-3 times that of the ordinary heating rod, and it can save 50% of electricity for you. At the same time, the heating rod has a temperature memory function, which automatically saves the set temperature after the power is turned off, and automatically heats to the set temperature after the mains power returns. Warm Notice: Before use, soak in water for about one minute!!!( If shows "E1"). 🐠 Safety Design & Over Temperature Protection: This heater has overheating protection function and it can be auto shut off when out of water. When overheating (more than 97°F), it will automatically shut down and display E2 fault, it will automatically reset when it cools to the starting temperature (usually 4°F lower than the set temperature). When the water level is lower than the water level probe, it will stop heating, automatically cut off the power, and display E1 fault. 🐠 High-quality Quartz Tube Materials: The aquarium heater is made of high-quality quartz explosion-proof glass and high thermal conductivity silicon carbide, and is double-sealed with a black protective cover to prevent explosion and corrosion, and protect fish and other livestock are protected from burns. 🐠 Product Parameters: Voltage:110-120V/60Hz; Cord length: 5.2ft; Temp Accuracy:±2°F; °C/°F conversion:Long press the set button can automatically conversion; Over-temp:Temp above 97°F(36°C), heater will shut off automatically; Control Range:68°F~94°F; Dimension: 9.1 x 3.4 x 1.3 inch.