Use the car inverter strictly in accordance with the user manual. Secondly, the output voltage of the inverter is 220 volts alternating current, and this 220 volt is in a small space and is in a mobile state, so be very careful. Keep it in a safe place (especially away from children!). In case of electric shock. When not in use, it is better to cut off its input power. Third, do not place the inverter in the sun or near the outlet of the heater. The working environment temperature of the inverter should not exceed 40 degrees centigrade. Fourth, the inverter works with heat, so do not place objects near or above it. Fifth, the inverter is afraid of water, do not let it rain or sprinkle water.