QR Code Link to This Post (screen in person is much more clearer)
THIS DURABLE VINTAGE TEST EQUIPMENT WORKS ON ANY BATTERY IGNITION SYSTEM. DIRECT READINGS ON 4,6 & 8 CYLINDER ENGINES. SOLID STATE VOLTAGE REGULATION ELIMINATES NEED TO SET CONTROL LEVELS. SELF ADJUSTING TEMPERATURE COMPENSATION. LONG LASTING 9 VOLT BATTERY. EASY TO FOLLOW INSTRUCTIONS INCLUDED.