High conversion efficiency, smart soft start function. 2 multiple safe protection. 3 input and output are completely independent. 4 smart,light, and portable, designed for home use. 5 universal socket, suitable for all kinds of plugs. 6 High-precision voltage stability technology. 7 Aerospace-grade silence technology. Cooler of fan and working State are intellectual controlled by MCU, which mostly prolong its service life and helps to save the power consumption.