DIGITAL INDUCTIVE ADVANCE TIMING ANALYZER EASY TO OPERATE ON ALL 12 VOLT IGNITION SYSTEM. EXCELLENT PERFORMANCE AT ALL SPEEDS THROUGH 8000 RPM MAXIMUM RATING BRIGHT BULB PROVIDES CONCENTRATED LIGHT FOR EASY VISIBILTY OF TIMING MARK SPARK ADVANCE CONTROL ADJUSTABLE FROM 0 DEGREE TO 60 DEGREE BTDC LED DIAGMOSTIC INDICATOR SHOWS ACCURATE ENGINE RPM, DWELL ANGLE, VOLT AND ADVANCE DEGREE