Easy to use with no electrician required， the ST Switch is a do-it-yourself smart portable automatic transfer switch that automatically transfers utility power to power from your portable generator. It’s a first of its kind technological innovation exclusive to Smart Switch Ready Westinghouse Portable Generators. The ST Switch is engineered to bridge the gap between traditional portable generators and standby generators by introducing home standby functionality with cost-effective versatility to provide a complete home backup power solution. The ST Switch also keeps the battery charged while connected to utility power. Compact and lightweight at less than 9 lb.， it’s ultra-portable and can be conveniently placed any location it’s needed. Maintaining support for your security system， sump pump， refrigerator， furnace， or essential household appliance is now more effortless than before. With dependability and added flexibility， the Westinghouse ST Switch enables you to have peace of mind around-the-clock.