Feature: 1. Plastic shell, quartz glass tube is used inside, the water level is as low as 3.5CM/1.4in, suitable for a variety of aquarium heating. 2. Environmental over-temperature protection, overheating will automatically stop working. 3. LED digital display is clear at a glance, real‑time water temperature, over‑temperature alarm, and fault self‑check three status displays, and you can see clearly in the water and at night. 4. Over‑temperature protection to avoid cooking fish. When the water temperature in the tank exceeds 36℃, the heating will be forced to stop and the display will flash and display EE. 5. When the LED displays the fault code and flashes, it means that there is a corresponding situation, EE: over temperature alarm, H: probe short circuit, R: probe open circuit. Specification: Condition: 100% brand newItem type: Mini Anti‑explosion Heating RodMaterial: Plastic + quartz glassColor: As picture shownSize: Approx. 6.5x11x3.5cm/2.6x4.3x1.4inPurpose: heating constant temperature for fish tank, tortoise tank, reptile tank, and aquarium Voltage: 220-240V, 50Hz/60Hz Temperature control range: 17-34℃ Suitable for water level: as low as 3.5cm/1.4in Power cord length: Approx. 110cm/43.3in. Package List: 1 x Heating rod (including power cord, temperature control switch)