“This heating rod can ensure the heat output and maintain the temperature of the water in the tank. It can automatically adjust temperature, which is good for aquarium fish. Feature: It can not only provide heat output, but also maintain the water temperature in the water tank stable. The scale of the temperature indicator can be adjusted between 20 and 34 °C (68 to 93°F). Fully submersible double insulation, durable and safe design. Power indicator light to ensure safe operation. Temperature can be adjusted automatically, which is good for aquarium fish. feature: black Material: glass Plug: European plug Power: 25W Voltage: 220-240V Frequency: 50/60 Hz Range Temperature Range: 20~34°C/68~93°F Project Duration: 25W: 20.5cm/