Note on 21 Feb 2014 : Since we launched this kit in 2008, over 700 kits were sold ! Now it is back to stock again ! This is the the full kit ( PCB + components) of a soft start switch for high power amplifier. The soft switch limits the in-rush current at the time the power amplifier is switched on. This can prevent the circuit breaker in your home to be false triggered and protect the amplifier's internal electronics too ! The kit components are for 220V/240V region. For 110V application two component values ( 1 capacitor and 1 resistor) are required to change. PCB dimension : 9cm x 6cm. The assembled picture is for reference. This is an sale for an unassembled kit. The brief schematic is for reference too. We provide actual schematic by EMAIL to buyers( to be attached with the shipment notice). We do air shipping worldwide at US$7.00. We welcome combine shipping. Powered by SoldEazy