Tekpower HP9810 Automotive Digital Multimeter All-around meter designed for automotive testing, trouble-shooting & household electrical problems AC/DC Voltage + DC Amp + Resistance + Temperature + Diode + Continuity + Tachometer + Dwell Angle Dwell angle & tachometer measurement, number of cyclinders selectable, 4/6/8 Measure temperature up to 1,800 F One-year manufacturer's warranty