Spider Power Supply. Designed to be used by groups simultaneously, providing smoothed, regulated DC voltages of 1.5, 3, 4.5 or 6V DC. which are selected by rotary switch. Max output current is 1A Other features include mains on/off power indicator and an output voltage indicator in the spider's eyes (if he winks call the teacher). Output is via four pairs of colour coded 4mm terminals. Housed in rugged ABS case.