hygger Explosion-Proof Carbon Mini Submersible Aquarium Heater 15W Small Heater with Over-Temperature ProtectTurtle and Betta Tank Heater with Digital Display External Controller

- LED digital temperature display, and with external controller adjustment, safe and convenient operation. - External temperature controller: each press increases by one degree, has Celsius (20?~64?) and Fahrenheit (68?~94?), wide temperature range, suitable for a variety of fish. - Explosion-proof carbon heating rod: Safer than traditional coil heaters. - Over-temperature protects against high temperature in the tank: When temp pass 97?(36?),the LED display shows “E2”, the heater will shut off automatically. - The profile is very small, but powerful, it does not occupy the space of the fish tank and does not block the line of sight, and it can be well hidden in the fish tank. - Real-time temperature display. After the setting is completed, the current real-time temperature will be displayed, eliminating the inconvenience and unsightly trouble of using an external thermometer. - Working status display, red light on is heating, blue light on is constant temperature. - The heater has only a small gap with a width of about 0.1in. No fish can enter, so there is no need to worry about fish being stuck. - This is a heater that converts between Celsius and Fahrenheit. Long press the control button to select the unit you want. - The inside is completely sealed, very safe, and can prevent leakage. - Strong suction, stable adsorption and not easy to fall off the tank wall. - It can be used in turtle tanks as well as fish tanks, freshwater and saltwater, and has a wide range of applications. ·Perfect water temperature for betta: 75-81?. ·Perfect water temperature for turtle: 77-86?.