Cebek FE-123 module is a single rail 12VDC stabilized power supply. It can deliver a maximum of 600mA, the output is fully regulated and short circuit protected. A PCB mounted pre-set potentiometer is supplied to adjust the output voltage (10 - 15VDC), to allow for long cable runs and supply voltage variations. The FE-123 module has a small enclosed transformer mounted on the circuit board. and LED to indicate its operating.