Warning: The heater must be completely submerged in water when it is in working condition, do not use it for more than 3 hours continuouslyPlease do not plug two heaters into the same outlet to avoid fire. Please remove the heater before touching the waterApplication scope The immersion heater can be used in a variety of vessels. Place it under water and plug it in, it will automatically heat the water. You don't have to worry about your plastic buckets being melted by the heat pipe because they have a jacket and never touch each other..Power Rating : 3000 (W)Note: Due to manual measurement, please accept 0-3cm variation. Thank you for your understanding. The screens are calibrated differently. The color of the product shown in the photos may vary slightly from the actual product. Please refer to our sizes before ordering.Delivery quantity: 1 set