This emergency power supply is a portable energy storage power supply for emergency power backup, outdoor traveling, emergency disaster relief, field work and other applications. The product has a built-in lithium battery, the battery is designed for 8 strings, the voltage is 25.6Vdc (8*3.2V), there is an inverted AC output, the output is 230V (50/60Hz) pure sine wave, with multiple DC output ports input ports as well as USB-A and USB-C interfaces.