Feature: 1. Made of milky white quartz tube, explosion‑proof, prevent leakage, service life of more than 3 years. 2. Good heat resistance, good insulation, high heat conduction efficiency, safety and reliability. 3. This heating rod supports automatic constant temperature and is suitable for heating and keeping fish tanks and aquarium. 4. External temperature controller, when water temperature reaches set temperature, it stops heating; when it is lower than set temperature, it automatically heats up. 5. The temperature control part is fixed internally, temperature sensitivity is enhanced by the temperature setting treatment, and temperature difference is reduced by 50%. Specification: Item Type: Heating Rod Material: Quartz Uses: Heating fish tanks and aquarium Voltage: 220V. Package List: 1 x Heating Rod (Included Power Cord) Note: 1.Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3.Dear customer, please rest assured to buy without worrying about the plug adaption. We will provide an adapter for you according to different country standard and make sure its normal use.