The heater has a timer function. You can set the time by pressing the SET button. When the time is up, the power will automatically turn off and an audible alarm will sound. Prevent accidents caused by forgetfulness during use. You don't have to stand next to it during use, it's safer and more convenient. Submerge it in water to an appropriate level and plug it into a grounded wall socket. Then the immersion heater can start working. With a high-quality stainless steel protective cover, the submersible heater will effectively prevent the heating elements from coming into direct contact with people or animals, and the heat is dissipated faster in the water by flowing through the holes in the cover. Durable and reusable. The holes on the cover dissipate heat faster in the water. 3000W can heat 5 gallons of water in minutes. To insert the heater, make sure the heater is completely submerged in the water and then connect the 220V power supply. Easy operation: Submerge the heater to the water level (the heater has a safe water level line). Plug into a grounded wall socket. Check the power indicator in the socket to make sure the kettle is on, and then the portable heater starts to work. Warning: The power cord and handle must not be submerged in water. Plug type: EU plug, applies to Indonesia, Germany, France, Spain, Italy, etc. Color: Black Material: Plastic + Stainless steel. Package contents: 1 x Heater Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.