Heathkit ID-29 Automotive Tune-Up Meter Dwell meter: 8 cyl - 0-45 degrees 6 cyl - 0-60 " 4 cyl - 0-90 " 3 cyl - 0-120 " Tachometer: 0-1500 rpm 0-4500 rpm Voltmeter: 0-15 vdc Accuracy: +- 3% of full scale Power: 10ma Meter: 4.5", 1ma, 100 degrees Dimensions: 8.5"w x 4.25"h x 7.25" d Weight: 2.5lbs