Built in IC Regulated DC power supply 15V, 150mA. Different types of components like transistor, Resistors & Capacitors are mounted on the front panel. Front panel built with high class insulated printed circuit board sheet with nicely printed circuits & symbols. Fuse is provided for short circuit protection. Connections are brought out through 4mm colored sockets. The trainer is housed in ABS plastic / sheet metal cabinet. Built in IC Regulated DC power supply 15V, 150mA.