UEi Universal Enterprises ADM5201 Automotive Digital Multimeter Includes 4 testing functions - O2 Sensor, ground, battery and alternator charging and battery drain tests Diagnose 1 to 12 cylinder Engines - Accurate RPM measurements and 4 step adjustable triggers ms-Pulse Width test - PFI and TBI type fuel injectors, Ideal air control motors and electronic transmission controls 4-4/5 digit, 50,000 count primary and 9,999 count secondary dual display with bar-graph (Frequency range: 99,999 counts) Temperature measurement up to 2,372 degree F or 1,300 degree C