Front Back Character: Power bypass to secure power source Suitable for video recorders, computers, microwave ovens¡K..etc Two AC INPUTS to supply to AC loads Master input and Slave input Input source can be generators, inverters, mains..etc Total switching time less than 12 msec Switching capacity: 20Amps, 40Amps Frequency: 50/60Hz (selectable) Universal output sockets to be plugged in Easy understanding LED indicators to display the power condition Description: Auto Transfer Switch with master input and slave input, which delivers power as slave input once master input fail automatically. Specifications:  Model No. PM-ATS-20A  Maximum switched capacity 20A  Master Input  Voltage 190-240 volts  Frequency 50Hz/60Hz (selectable)  Slave Input  Voltage 0-240 volts  Frequency Not monitored  Thresholds for output of Master  For switching to Slave 180 volts  For switching to Master 188 volts  Continuous stability interval 30 sec  Dimensions (H x W x D) 95 x 130 x 220 mm