[Intelligent heating and power off]The heating time and heating temperature can be set freely. After waiting, the controller will complete your settings and automatically disconnect the power to stop heating to avoid fire. Remember, the heating time should not exceed 3 hours, it is easy to overheat and burn out the controller [Read To Avoid Fire]The heater must be completely immersed in water under working conditions. Before touching the water with your hands, please unplug the power plug first, and then take out the water heater Please do not use it continuously for more than 3 hours If your bathtub or small swimming pool has a large capacity and needs to heat more than two water heaters at the same time, Can be used with two water heatersbut do not plug the two water heaters into the same socket [Heating efficiency]The immersion water heater has a rated power of 2000W, which can quickly heat 5 gallons of water. The protective case is made of high-quality stainless steel and has a porous design with good thermal conductivity.[Easy to Use]Place the pool water heater into water designed to contain boiling water, fill the container with water to full cover the submersible bucket heater , plug portable water heater into a properly grounded 120V AC outlet, make sure the portable immersion heater is on, make the pool warmer in a few minutes[Very Wide Use]The electric immersion heater can be used in water,pool heaters for above ground pools fit for bucket, basin, bath tub, mini inflatable swimming pool, etc.