Ⅰ. Warning: The heater must be fully immersed in water when it is working, do not use it for more than 3 hours without interruption. Do not plug two heaters into the same socket to avoid fire. Remove the heater before touching the water. Ⅱ. Scope of application: The immersion heater can be used in a variety of containers. Place it under water and plug it in, it will automatically heat the water. You don't have to worry about your plastic buckets melting from the heat pipe because they have a shell and never touch each other. Ⅲ. Product Power: 3000 (W) Ⅳ. Note: Due to manual measurement, please allow 0-3 cm difference. Thank you for your understanding. The color of the item shown in the pictures may be slightly different from the actual item. Please refer to our sizes before ordering. Ⅴ. Shipping Quantity: 1 Set Ⅵ. The product has a time setting and can heat up to 40 degrees Celsius in 10-15 minutes.