1. Specially designed for tortoise tanks and small fish tanks, suitable for water levels as low as 3.8CM, the heating rod will stop working directly after leaving the water to prevent dry burning.2. Sealed tank of glue, safety shield: The circuit board is sealed with insulating epoxy resin to prevent leakage, and the sturdy shield is resistant to high temperature and is not easy to deform, so as to avoid scalding of pets.3. Rapid heating, over-temperature protection: Nickel heating wire has better thermal conductivity,4. Intelligent digital display, external temperature adjustment: Intelligent LED big numbers display the temperature in real time, and the external temperature adjustment is more convenient.5.heating speed, and power saving; built-in smart chip, automatically power off when the temperature is too high.