Do not place the heater directly in a bathtub or other water container. This is a high-power heating product. Do not place the heater directly below the socket outlet. Check whether the plug properly fits into the power outlet when using this heater for the first time. Checking method: Insert the power plug into the power outlet, then select the highest constant temperature. Turn off and unplug the heater after about 30 minutes to check whether the prongs of the power plug are too hot (temperatures in excess of 55°C). If so, try a different power outlet so as to avoid the risk of a molten power plug or fire due to overheating. 4