Auto control three phase power saver ,save up 30% Switch : with swith to control "Auto" , " ... energy saver three phase power saver with LED display and Microchip control, For industryPhase : ThreeRated voltage: 90v-400vLED Display , can see the savingRTOS embedded ... , House, Restaurant,Office ,Factory,Cyber-cafe,etc.. 400AMP Three phase power saver,LED,LCD display