SPS Series Feature: 1. Designed with high frequency and high power factor PWM 2.Numeral display LCD to indicate currency, voltage and wattage. 3.Stylish and modern out casing design 4.Full range voltage designed (to be optional) 5.Intelligent overheat protection to adjust output current 6.The output voltage and the output current adjustable 7.USB with 5V/500mA output power supply. 8.Output overload current protection 9.Output shortage protection