PB-1 is the power supply for guitar effects with 9V direct current (DC). It has eight full galvanically separated outputs which enable to built professional guitar systems without ground loops. Using proper adapters PB-1 enables also to obtain voltages 12V, 15V and 18V DC. It is worldwide voltage compatible (nominal line voltage from 100V to 230V) by connecting the mains cable (attached to the packet) with a connector appropriate for a given country.