High Power: pool heater runs with energy-saving, which can heat 5 gallons of water in minutes. The immersion heater is light and small, easy to carry.Safety: The immersion heater with stainless steel protective guard can effectively prevent the heating element from directly contacting the human body, both sides are fixed with mechanical and AB glue to make the product more solid and not easy to fall off, which is more safer.Easy to Use: Fill the container with water to full cover the bucket heater, plug it into a properly grounded 120V AC outlet, make sure the portable pool heater is on, make the pool warmer in a few minutesWidely Application: The immersion water heater can be used for small ground swimming pool, buckets, basins, bathtubs, and also for use in a variety of scenarios: construction, animal husbandry, car washes, etc. The portable heater can be used indoors and outdoors.Warning: 1.Do not plug two heaters into the same outlet to avoid burning; 2.Do not leave unattended; 3.No dry burning; 4.Unplug it before pick up the heater or will burn. 5. Make sure the water is always full cover the heater.