Small 5/8" x 1 5/8" x .35" converter circuit converts input voltage of 3V up to 5VDC into an output of -27V on one output and -30V on the other. Output current is in the 3-4ma range. Has 4 functional leads: common, + input, -27VDC output and -30VDC output. With simple hookup diagram. Brand new.