The portable power supply provides Modified Sine Wave output, and can be compatible to AC electric appliance that works with Sinusoidal waveform(power <100W). However, anything that uses an AC motor isn’t going to work to full capacity on a modified sine wave. such as an electrical fan, It will even make the electric appliance arouse some noise.Appliances like refrigerators,microwaves, and compressors that use AC motors and some delicate medical equipment will be better off with a pure sine wave inverter. This product is only used for emergency, it cannot replace the normal alternating current, for long-term use, please adapts the power station specification required by electrical appliances.