Charge tester 200mV to 600V, alternate and continuous current. Liquid crystal screen, with backlighting. .Fuse protected. operates with a square 9V battery Measures the currents, voltage and resistance, control diodes, measures the gain transistors (NPN and PNP). Fused. Works with a 9V square battery supply pressure (reference A83540). Dim. 138 x 69x 31mm.