INSTRUMENT CONSISTS OF POWER SUPPLY FOR G.M. TUBE WITH DIGITAL READ O METER. 6 DIGIT COUNTING SYSTEM WITH ITS POWER SUPPLY. SONTROLS FOR RESE START AND STOP FIXED ON PANEL. ONE PRESETABLE TIME WITH 3 DIGIT DISPLAY AN THUMB WHEEL SWITCH. COMPLETE WITH G.M.TUBE STAND, AND ONE RADIO ACTIVE SOURCE.