12v 100mA Switch-Mode-Power-Supply (SMPS) for masthead amplifiers. Thermal cut-out fuse in transformer + short circuit & overload protection. LED “power on” indicator. Double sided PCB for reliability and stability. Fully screened RF loop-through with F-Connectors. 0.6m mains lead with UK mains plug with 3A fuse fitted. Low insertion loss. Visible fixing lugs and screw holes for easy fixing.