(Easy to Use)--- Place camping 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 outlet, make sure the portable immersion heater is on, make the pool warmer in a few minutes! (Stainless-steel Guard)--- The heavy duty stainless-steel guard on the electric bucket heater protects the heating element from directly contacting persons or animals. The holes on the guard of submersible water heater help release heat into the water faster. (Good Quality Portable Water Heater)--- : immersion water heater runs with energy-saving .Imersion heater boils water in minutes . All you need to do is just put bucket heater in to the water and plug the pool warmer,very easy to use. (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.This immersion heater is handy and super lightweight, making it pool warmer any grounded wall outlet. Then the immersion heater can start working. (Must read the instruction manual)--- 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, please do not plug the two water heaters into the same socket to avoid fire.